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- Question
- 8 persons can build a wall 140 m long in 42 days. In how many days can 30 persons complete a similar wall 100 m long?
Options- A. 11
- B. 13
- C. 8
- D. 19
- Correct Answer
- 8
ExplanationAs per given question,
8 persons can build a wall 140 meter long in 42 days.
1 persons can build a wall 140 meter long in 42 x 8 days.
1 persons can build a wall 1 meter long in 42 x 8 / 140 days.
30 persons can build a wall 1 meter long in 42 x 8 / 30 x 140 days.
30 persons can build a wall 100 meter long in 42 x 8 x 100 / 30 x 140 days.
30 persons can build a wall 100 meter long in 42 x 8 / 3 x 14 days.
30 persons can build a wall 100 meter long in 42 x 8 / 42 days.
30 persons can build a wall 100 meter long in 8 days. - 1. On a scale of a map 0.6 cm represents 6.6 km. If the distance between two points on the map is 80.5 cm, what is the actual distance between these points?
Options- A. 885.5 km
- B. 870 km
- C. 872.5 km
- D. 895 km Discuss
- 2. If the price of 357 apples is Rs. 1517.25, what will be the approximate price of 49 dozens of such apples?
Options- A. Rs. 2500
- B. Rs. 2800
- C. Rs. 2900
- D. Rs. 2400 Discuss
- 3. Running at the same constant rate, 6 identical machines can produce a total of 270 bottles per minute. At this rate, how many bottles could 10 such machines produce in 4 minutes?
Options- A. 1800
- B. 1600
- C. 2500
- D. 1700 Discuss
- 4. If 16 men working 7 hours day can plough a field in 48 days, in how many days will 14 men working 12 hours a clay plough the same field?
Options- A. 56
- B. 32
- C. 38
- D. 30 Discuss
- 5. If 7 spiders make 7 webs in 7 days, then how many days are needed for 1 spider to make 1 web?
Options- A. 10
- B. 7
- C. 3
- D. 4 Discuss
- 6. A certain number of persons can finish a piece of work in 100 days . If there were 10 persons less, it would take 10 more days finish the work. How many persons were there originally?
Options- A. 190
- B. 180
- C. 110
- D. 196 Discuss
- 7. A garrison of 500 persons had provisions for 27 days. After 3 days a reinforcement of 300 persons arrived. For how many more days will the remaining food last now?
Options- A. 27 days
- B. 28 days
- C. 26 days
- D. 15 days Discuss
- 8. A hostel had provisions for 250 men for 40 days. If 50 men left the hostel, how long will the food last at the same rate?
Options- A. 58 days
- B. 50 days
- C. 45 days
- D. 67 days Discuss
- 9. In a camp, food was sufficient for 2000 people for 54 days. After 15 days, more people came and the food last only for 20 more days. How many people came?
Options- A. 1900
- B. 2400
- C. 1940
- D. 2220 Discuss
- 10. Three pumps working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?
Options- A. 19
- B. 14
- C. 11
- D. 12 Discuss
Unitary Method problems
Search Results
Correct Answer: 885.5 km
Explanation:
0.6 cm represents 6.6 km in a scale.
1 cm represents 6.6 / 0.6 km in a scale.
80.5 cm represents 6.6 x 80.5 / 0.6 km in a scale.
80.5 cm represents 11 x 80.5 km in a scale.
80.5 cm represents 885.5 km in a scale.
Correct Answer: Rs. 2500
Explanation:
As we know that,
1 Dozen = 12 piece
49 Dozen = 49 x 12 piece
Price of 357 apples is Rs. 1517.25.
Price of 1 apples is Rs. 1517.25 / 357.
Price of 49 x 12 apples is Rs. 1517.25 x 49 x 12 / 357.
Price of 49 x 12 apples is Rs. 1517.25 x 7 x 12 / 51.
Price of 49 x 12 apples is Rs. 1517.25 x 7 x 4 / 17.
Price of 49 x 12 apples is Rs. 2499.
So Price will be around 2500 and answer will be 2500.
Correct Answer: 1800
Explanation:
As per given question,
In 1 minute, 6 identical machines can produce a total of 270 bottles.
In 1 minute, 1 identical machines can produce a total of 270 / 6 bottles.
In 1 minute, 10 identical machines can produce a total of 270 x 10 / 6 bottles.
In 4 minute, 10 identical machines can produce a total of 270 x 10 x 4 / 6 bottles.
In 4 minute, 10 identical machines can produce a total of 45 x 10 x 4 bottles.
In 4 minute, 10 identical machines can produce a total of 1800 bottles.
Correct Answer: 32
Explanation:
16 men working 7 hours day can plough a field in 48 days.
1 men working 7 hours day can plough a field in 48 x 16 days.
1 men working 1 hours day can plough a field in 48 x 16 x 7 days.
14 men working 1 hours day can plough a field in 48 x 16 x 7 / 14 days.
14 men working 12 hours day can plough a field in 48 x 16 x 7 / 14 x 12 days.
14 men working 12 hours day can plough a field in 48 x 16 / 2 x 12 days.
14 men working 12 hours day can plough a field in 48 x 4 / 2 x 3 days.
14 men working 12 hours day can plough a field in 48 x 2 / 3 days.
14 men working 12 hours day can plough a field in 16 x 2 = 32 days.
Correct Answer: 7
Explanation:
7 spiders make 7 webs in 7 days.
? 1 spiders make 7 webs in 7 x 7 days.
? 1 spiders make 1 webs in 7 x 7 / 7 days.
? 1 spiders make 1 webs in 7 days.
Correct Answer: 110
Explanation:
Given in the question,
Let y be the persons there originally .
Work done by y persons can finish = 100 days
If there were 10 persons less, it would take more days finish the work in 10 days
i.e. ( y - 10 ) = 110
According to question ,
y × 100 = ( y - 10 ) × 110
? 100y = 110y - 1100 ? 10y = 1100 ? y = 110
Therefore , 110 persons were there originally .
Correct Answer: 15 days
Explanation:
Let the remaining food will last for D days.
500 men had provisions for (27 ? 3) = 24 days.
( 500 + 300 ) men had provisions for D days.
More men, Less days ( Indirect Proportion )
we can write as :-
? 800 : 500 :: 24 : x ? (800 × D ) =( 500 × 24 )
? ( 500 × 24 ) /800 =15
Therefore , 15 days is correct answer .
Correct Answer: 50 days
Explanation:
Suppose the food will last for D days at same rate .
250 men had provisions for 40 days.
( 250 - 50 ) men had provisions for D days.
Less men, More days ( Indirect Proportion )
we can write as :-
? 200 : 250 :: 40 : D ? (200 × D ) =( 250 × 40 )
? ( 250 × 40 ) /200 = 50
Therefore , 50 days is required answer .
Correct Answer: 1900
Explanation:
Correct Answer: 12
Explanation:
According to question ,
3 pumps working in 2 days = 8 × 2 = 16 hours
It means that they can empty a tank in 16 hours .
3 pumps 1 hour work = 1/16
1 pumps 1 hour work = 1/( 3 × 16 )
4 pumps 1 hour work =4 × 1/( 3 × 16 ) = 1 / 12
Hence , they will empty the tank in 12 hours .
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