Discussion
Home ‣ Aptitude ‣ Time and Work See What Others Are Saying!
- Question
- 15 men can complete a work in 10 days while 20 boys can complete the same work in 15 days. How many days will 10 men and 10 boys together take to complete the same work?
Options- A. 10 days
- B. 8 days
- C. 12 days
- D. 9 days
- Correct Answer
- 10 days
Explanation? In 10 days a work is complete by 15 men
? In 1 day a work is complete by = 15 x 10 = 150 men
? In 5 days the work is complete by = 20 boys
? 1 day the work is completed = 20 x 15 = 300 boys
? 150 men = 300 boys
or 1 men = 300/150 = 2 boys
10 men = 2 x 10 = 20 boys
10 men + 10 boys = 20 + 10 = 30 boys
? 20 boys complete the work in 15 days
? 30 boys complete the work in (15 x 20)/30 = 10 days - 1. The difference between two number is 18 if four times the second number is less then three what is the sum these two number?
Options- A. 100
- B. 80
- C. 86
- D. 92 Discuss
- 2. The radii of two spheres are in the ratio 1 : 2 . The ratio of their surface areas is?
Options- A. 1 : 2
- B. 1 : 4
- C. 1 : ?2
- D. 3 : 8 Discuss
- 3. A. B and C together start a business. B invests of 1/6 of the total capital while investments of A and C are equal. If the annual profit on this investment is ? 33600, find the difference between the profits of B and C.
Options- A. ? 8400
- B. ? 7200
- C. ? 6000
- D. ? 9600 Discuss
- 4. What annual payment will discharge a debt of ? 1092 due in 2 yr at 12% simple interest?
Options- A. ? 725
- B. ? 325
- C. ? 515
- D. ? 900 Discuss
- 5. ? 4/3 - ? 3/4 =?
Options- A. 1/2?3
- B. - 1/2?3
- C. 1
- D. 2?3 Discuss
- 6. My watch gains 5 minutes in every hour. How many degrees the second hand moves in every minute?
Options- A. 375°
- B. 380°
- C. 390°
- D. 365° Discuss
- 7. The Volume of a wall, 5 times as high as it is broad and 8 times as long as it is high, is 12.8 m 3. The breadth of the wall is?
Options- A. 30 cm
- B. 40 cm
- C. 22.5 cm
- D. 25 cm Discuss
- 8. In a company, 60% of the employees are men. Of these 40% are drawing more than ? 50000 per year. If 36% of the total employees of the company draw more than? 50000 per year, then what is the percentage of women who are drawing less than ? 50000 per year?
Options- A. 70%
- B. 60%
- C. 40%
- D. 30% Discuss
- 9. A jogger desires to run a certain course in 1/4 less time than he usually takes. By What per cent must be increase his average running speed to accopplish the goal?
Options- A. 50%
- B. 20%
- C. 25%
- D. 331/3 Discuss
- 10. If the price of mangoes is decreased by 40%, one could get 32 more mangoes for ? 120. Find the original price of each mango.
Options- A. ? 3.50
- B. ? 2.50
- C. ? 2.25
- D. ? 2.00 Discuss
More questions
Correct Answer: 92
Explanation:
Let first number = P
And second number = Q
According to the question
P - Q = 10 ....(i)
And 3P - 4Q = 18...(ii)
on multiply eq (i) by 3 and then subtract eq (ii) from it
3P - 3Q = 54
3P - 4Q = 18
Q = 36
On putting the value of Q in the eq (i)
P = 18 + Q = 18 +36
? P = 54
Required sum = P + Q = 54 +36 =90
Correct Answer: 1 : 4
Explanation:
Let their radii be x and 2x .
Ratio of their surface areas = [4?x2]/[4?(2x)2] = 1/4 = 1 : 4
Correct Answer: ? 8400
Explanation:
Given, Investment of B = 1/6 of total capital
? Investments of A and C each = 1/2(1 - 1/6) of total capital
= (1/2) x (5/6) of total capital
= (5/12) of total capital
Now. A's share : B's share : C's share = (5/12) : (1/6) : (5/12) = 5 : 2 : 5
Let A's share = 5N
B's share = 2N
C's share = 5N
According to the question.
5N + 2N + 5N = 33600
? 12N = 33600
? N = 33600/12 = 2800
? Difference in the profits of B and C
= 5N - 2N = 3N = 3 x 2800 = ? 8400
Correct Answer: ? 515
Explanation:
According to the formula,
Annual payment = 100P / [100 x T + {RT (T - 1)/2}]
= (1092 x 100) / [100 x 2 + {24 (2 - 1)/2}]
= (1092 x 100)/2012
= ? 515.09
? ? 515
Correct Answer: 1/2?3
Explanation:
?4/?3 - ?3/?4
= 2/?3 - ?3/2
= (4 - 3)/2?3
= 1/2?3
Correct Answer: 390°
Explanation:
Since minute hand gains 5 minutes in every 60 minutes
⇒ second hand gains 5 seconds in every 60 seconds
∴ In every 60 seconds true time, it moves 65 seconds
⇒ 65 × 6° = 390°.
Hence , required answer will be 390° .
Correct Answer: 40 cm
Explanation:
Let breadth = L meters. Then, height = 5L meters and length = 40L meters
? L x 5L x 40L = 12.8
? L3 = 12.8/200 = 128/2000 = 64/1000
? L = 4/10
Thus, breadth = (4/10) m = (4 x 100)/10 cm = 40 cm
Correct Answer: 70%
Explanation:
Let total number of employee be 100.
? Number of men = 60% of 100 = 60
and number of women = 40% of 100 = 40
Number of men drawing more than ? 50000 = 40% of 60 = 24 men
Since, number of total employees drawing more than ? 50000 = 36% of 100 = 36
Number of women who more than ? 50000 = 36 - 24 = 12
Number of women who draw less than ? 50000 = 40 - 12 = 28
Percentage of women who draw less then ? 50000 per year = (28 x 100)/40 = 70%
Correct Answer: 331/3
Explanation:
Let usual speed and usual time taken by the jogger are D and T, respectively.
Let his new speed be D'. Then,
DT = (3D'/4)T
? D = 3D'/4
? D' = 4D/3
Thus, he has to increased his speed by
[(4D/3 - D) / D] x 100% .
= 331/3 %
Correct Answer: ? 2.50
Explanation:
Let the original price be ? N per kg.
New price per kg = 60% of N = 3N/5
? 120 / (3N/5) - 120/N = 32
? 600/3N - 120/N = 32
? 200/N - 120/N = 32
? 80/N = 32
? N = 80/32 = 2.5
So, the original price is ? 2.50
Comments
There are no comments.More in Aptitude:
Programming
Copyright ©CuriousTab. All rights reserved.