Race Institute

#38, Burkit Road,

Opposite to bus terminal,

Thyagaraya Nagar

Chennai - 600 017.






Contact Person:

Bharath Seeman

Chain Rule


1.If it takes 32 days to assemble 8 cars, how long would it required to assemble 28 cars?

A. 60

B. 56

C. 112

D. 124

2.Working 14 hrs daily 12 men can complete a piece of work in 27 days. In how many days would 14 men complete the same piece of work working 9 hours daily?

A. 18

B. 00:00

C. 24

D. 36

E. 15

3.30 men can produce 1500 units in 24 days 6 hours a day. In how many days, can 18 men produce 1800 units working 8 hours per day?

A. 36

B. 45

C. 18

D. 27

4.A contract is to be complete in 64 days, and 114 men were set to work, each working 6 hours/day. After 40 days of the work completed. How many more men may be employed to complete the work on time? Each man now working 10 hours/day?

A. 38

B. 159

C. 69

D. 140

5.A fort has provision for 300men for 30 days. After 5 days 50 men left the fort. How long will the fort last at the same rate?

A. 60

B. 54

C. 72

D. 112

E. 30

6.A garrison of 4000 men had provision for 30 days. When given at the rate of 1200 gram per head. At the end of 12 days, reinforcement arrives and it was found that the provisions will last 10 days more when given at the ratio of 900 gram/head. What is the strength of the reinforcement?

A. 2400

B. 1600

C. 5000

D. 5500

7.24men and 36 boys, working hours a day, can do a piece of work in 30 days. If a man works equal to 24 boys, then how many toys will be required to help 42 men to do twice the work in 25 days, working 9 hours a day?

A. 42

B. 168

C. 84

D. 21

8.Twenty men take 21 days of 8 hours each to do a work. How many days of 6 hours each would 45 women take if 3 women do as much work as a man?





9.Two cogged wheels of which one has 32 cogs and the other 64, work into each other. If the latter turns 90 times in three quarters of a minute, how often does the other turn in 8 seconds?

A. 4

B. 8

C. 16

D. 32

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

A. 1


C. 40


E. 20