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- Question
- A tree is 12 m tall and casts an an 8 m long shadow. At the same time, a flag pole caste a 100 m long shadow. How long is the flag pole?
Options- A. 150 m
- B. 200 m
- C. 125 m
- D. 115 m
- Correct Answer
- 150 m
Explanation? 8 m shadow means original height = 12 m
? 1 m shadow means original height = 12/8 m
? 100 m shadow means original height = (12/8) x 100 m
= (6/4) x 100 = 6 x 25 = 150 m - 1. In a race , Ravi covers 5 km in 20 min. How much distance will he cover in 100 min?
Options- A. 40 km
- B. 35 km
- C. 26 km
- D. 25 km Discuss
- 2. If 45 m of a uniform rod weight 171 kg, then what will be the weight of 12 m of the same rod?
Options- A. 49 kg
- B. 42.5 kg
- C. 55 kg
- D. 45.6 kg Discuss
- 3. A worker makes a toy in every 2h. If he works for 80h, then how many toys will he make?
Options- A. 40
- B. 54
- C. 45
- D. 39 Discuss
- 4. If 16 dozens bananas cost ? 360, then how many bananas can be bought in ? 60?
Options- A. 16 bananas
- B. 48 bananas
- C. 32 bananas
- D. 50 bananas Discuss
- 5. If cost of 15 eggs is ? 75, then find out the cost of 4 dozens eggs.
Options- A. ? 240
- B. ? 300
- C. ? 150
- D. ? 185 Discuss
- 6. If the cost of x meters of wire is 'd' rupees, that find the cost (in Rupees) of 'y' meters of wire at the same rate.
Options- A. dy x
- B. x - d
- C. ydx
- D. y + d Discuss
- 7. In a dairy farm, 40 cows eat 40 bags of husk in 40 days. In how many days one cow will eat one bag of husk?
Options- A. 15
- B. 40
- C. 38
- D. 32 Discuss
- 8. 21 goats eat as much as 15 cows. How many goats eat as much as 35 cows?
Options- A. 38
- B. 49
- C. 37
- D. 41 Discuss
- 9. 39 persons can repair a road in 12 days, working 5 hours a day. In how many days will 30 persons, working 6 hours a day, complete the work?
Options- A. 10
- B. 13
- C. 18
- D. 136 Discuss
- 10. 4 mat-weavers can weave 4 mats in 4 days. At the same rate, how many mats would be woven by 8 mat-weavers in 8 days?
Options- A. 16
- B. 12
- C. 18
- D. 14 Discuss
Unitary Method problems
Search Results
Correct Answer: 25 km
Explanation:
? Distance covered in 20 min = 5 km
? Distance covered in 1 min = 5/20 km
? Distance covered in 100 min = (5/20) x 100
= 5 x 5 = 25 km
Correct Answer: 45.6 kg
Explanation:
Let the required weight be w kg.
Less length, Less weight (Direct proportion)
45 : 12 :: 171 : w
? w = (12 x 171)/45 = 45.6 kg
Correct Answer: 40
Explanation:
Let number of toys be N.
More hours, More toys (Direct proportion)
2 : 80 : : 1 : N
? N = 80/2 = 40 toys
Correct Answer: 32 bananas
Explanation:
Let the required number of bananas be N.
16 dozens bananas = 16 x 12 = 192 bananas
Less bananas, Less cost (Direct proportion)
360 : 60 : : 192 : N
? N = (60 x 192)/360 = 32 bananas
Correct Answer: ? 240
Explanation:
? Cost of 15 eggs = ? 75
? Cost of 1 egg = ? 75/15
? Cost of 4 dozens (4 x 12) = Cost of 48 eggs
= (75/15) x 48 = ? 240
Correct Answer: ydx
Explanation:
Cost of x meters ropes = Rs. d
? Cost of 1 meters ropes = Rs. d /x
? Cost of y meters ropes = Rs. dy/x
Correct Answer: 40
Explanation:
40 cows eat 40 bags of husk in 40 days.
? 1 cows eat 40 bags of husk in 40 x 40 days.
? 1 cows eat 1 bags of husk in 40 x 40 / 40 days.
? 1 cows eat 1 bags of husk in 40 days.
Correct Answer: 49
Explanation:
15 Cows eat as much as 21 Goats.
? 1 Cows eat as much as 21/ 15 Goats.
? 35 Cows eat as much as 21 x 35 / 15 Goats.
? 35 Cows eat as much as 21 x 7 / 3 Goats.
? 35 Cows eat as much as 7 x 7 Goats.
? 35 Cows eat as much as 49 Goats.
Correct Answer: 13
Explanation:
Since 39 persons can repair a road by working 5 hours in a day in 12 days.
? 1 persons can repair a road by working 5 hours in a day in 39 x 12 days.
? 1 persons can repair a road by working 1 hours in a day in 39 x 12 x 5 days.
? 30 persons can repair a road by working 1 hours in a day in 39 x 12 x 5 / 30 days.
? 30 persons can repair a road by working 6 hours in a day in 39 x 12 x 5 / 30 x 6 days.
? 30 persons can repair a road by working 6 hours in a day in 39 x 2 x 1 / 6 days.
? 30 persons can repair a road by working 6 hours in a day in 39 x 1 x 1 / 3 days.
? 30 persons can repair a road by working 6 hours in a day in 13 days.
Correct Answer: 16
Explanation:
4 mat-weavers in 4 days can weave 4 mats.
1 mat-weavers in 4 days can weave 4 / 4 mats.
1 mat-weavers in 1 days can weave 4 / 4 x 4 mats.
8 mat-weavers in 1 days can weave 4 x 8 / 4 x 4 mats.
8 mat-weavers in 8 days can weave 4 x 8 x 8 / 4 x 4 mats.
8 mat-weavers in 8 days can weave 4 x 2 x 2 mats.
8 mat-weavers in 8 days can weave 16 mats.
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