# Aptitude Questions

## Chain Rule

Q1. 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. 12

d. 18

Answer:

Q2. 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. 1800

b. 648

c. 10800

d. 2700

Answer:

Q3. 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. 16

d. 12

Answer:

Q4. 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. 195

b. 178

c. 112

d. 167

Answer:

Q5. 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. 10m

b. 13m

c. 11m

d. 12.5m

Answer:

Q6. 36 men can complete a piece of work in 18 days. In how many days will 27 men complete the same work?

a. 12

b. 14

c. None of this

d. 8

Answer:

Q7. A man completes of a job in 10 days. At this rate, how many more days will it takes him to finish the job?

a. 3

b. 5

c. 6

d. None of this

Answer:

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