Aptitude : Chain Rule Questions and Answers


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Q 1.   If 30 men can do a piece of work in 20 hours, then in how many hours will 12 men do it?

a. 18 hours

b. 30 hours

c. 40 hours

d. 50 hours

Answer : d


Q2.   3 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?

a.  9

b. 10

c. 11

d. 12

Answer : d

 

Q 3.   3 pumps, working 4 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work, to empty the tank in one day?

a. 7 hours

b. 8 hours

c. 6 hours

d. 5 hours

Answer : c


Q 4.   If the cost of x metres of wire is d rupees, then what is the cost of y metres of wire at the same rate?

a. Rs. (xy/d)

b. Rs. (xd)

c. Rs(yd)

d. Rs. (yd/x)

Answer : d


Q 5.   A wheel that has 6 cogs is meshed with a larger wheel of 12 cogs. If the smaller wheel has made 22 revolutions, then find the number of revolutions made by the larger wheel.

a. 11

b. 13

c. 15

d. 17

Answer : a


Q 6.   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?

a. 648

b. 1800

c. 2700

d. 10800

Answer : b



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Q 7.   If 30 men can build a wall 56 meters long in 5 days, what length of a similar wall can be built by 40 men in 3 days?

a. 36.5 m

b. 44.8 m

c. 62.3 m

d. 92 m

Answer : b


Q 8.   A fort had provision of food for 150 men for 45 days. After 10 days, 25 men left the fort. The number of days for which the remaining food will last, is:

a. 29  1/5

b. 37 2/4

c. 42

d. 54

Answer : c


Q 9.   5 mat-weavers can weave 5 mats in 5 days. At the same time, how many mats would be woven by 10 mat- weavers in 10 days?

a. 10 mats

b. 15 mats

c. 20 mats

d. 30 mats

Answer : c


Q 10.   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?

a. 10

b. 13

c. 15

d. 17

Answer : b


Q 11.   If 8 men can reap 40 hectares in 12 days, then how many hectares can 30 men reap in 20 days?

a. 175 hectares

b. 250 hectares

c. 300 hectares

d. 275 hectares

Answer : b


Q 12.   A man completes 5/8  of a job in 10 days. At this rate, how many more days will it takes him to finish the job?

a. 5

b. 7

c. 6

d. 8

Answer : c



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Q 13.   If 3 spiders make 3 webs in 3 days, then 1 spider will make 1 web in how many days?

a. 1 day

b. 1.5 days

c. 6 days

d. 3 days

Answer : d


Q 14.    If a quarter kg of potato costs 60 paise, how many paise will 200 gm cost?

a. 48 paise

b. 60 paise

c. 54 paise

d. 74 paise

Answer : a


Q 15.   In a diary farm, 20 cows eat 20 bags in 20 days. In how many days one cow will eat one bag of husk?

a. 10 days

b. 1/10 days

c. 30 days

d. 20 days

Answer : d


Q 16.   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?

a. 160

b. 40

c. 15

d. 30

Answer : b


Q 17.   18 men bind 900 books in 10 days. Find how many binders will be required to bind 600 books in 12 days?

a. 10

b. 11

c. 13

d. 15

Answer : a


Q 18.   A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs. When the smaller wheel has made 21 revolutions, then the number of revolutions mad by the larger wheel is:

a. 10

b. 11

c. 9

d. 15

Answer : c



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Q 19.   If 7 spiders make 7 webs in 7 days, then 1 spider will make 1 web in how many days?

a. 1

b. 7/2

c. 49

d. 7

Answer : d


Q 20.   An industrial loom weaves 0.128 metres of cloth every second. Approximately, how many seconds will it take for the loom to weave 25 metres of cloth?

a. 178

b. 195

c. 204

d. 488

Answer : b


Q 21.   A flagstaff 17.5 m high casts a shadow of length 40.25 m. The height of the building, which casts a shadow of length 28.75 m under similar conditions will be:

a. 10 m

b. 12.5 m

c. 15 .5

d. 17.5

Answer : b


Q 22.   In a camp, there is a meal for 120 men or 200 children. If 150 children have taken the meal, how many men will be catered to with remaining meal?

a. 30 

b. 20

c. 40

d. 50

Answer : a


Q 23.   36 men can complete a piece of work in 18 days. In how many days will 27 men complete the same work?

a. 18

b. 24

c. 22

d. 26

Answer : b


Q 24.   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?

a. 4

b. 8

c. 12

d. 16

Answer : b


Free Aptitude Question and Answer


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