Chain Rule Worksheet-3
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If 8 men can reap 80 hectares in 24 days, then how many hectares can 36 men reap in 30 days?
(a) 350 (b) 400 (c) 425 (d) 450
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A certain number of persons can dig a trench 100 m long, 50 m broad and 10 m deep in 10 days. The same number of persons can dig another trench 20 m broad and 15 m deep in 30 days. The length of the second trench is:
(a) 400 m (b) 500 m (c) 800 m (d) 900 m
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If 5 men or 9 women can do a piece of work in 19 days, then in how many days will 3 men and 6 women do the same work?
(a) 12 (b) 15 (c) 18 (d) 21
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49 pumps can empty a reservoir in
days, working 8 hours a day. If 196 pumps are used for 5 hours each day, then the same work will be completed in:
(a) 2 days (b) 
days (c) 
days (d) 3 days
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30 labourers, working 7 hours a day can finish a piece of work in 18 days. If the labourers work 6 hours a day, then the number of labourers to finish the same piece of work in 30 days, will be:
(a) 15 (b) 21 (c) 22 (d) 25
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If 7 spiders make 7 webs in 7 days, then 1 spider will make 1 web in how many days?
(a) 1 (b) 
(c) 7 (d) 49
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If 18 pumps can raise 2170 tonnes of water in 10 days, working 7 hours a day; in how many days will 16 pumps raise 1736 tonnes of water, working 9 hours a day?
(a) 6 (b) 7 (c) 8 (d) 9
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If 80 lamps can be lighted, 5 hours per day for 10 days for Rs. 21.25, then the number of lamps, which can be lighted 4 hours daily for 30 days, for Rs. 76.50, is:
(a) 100 (b) 120 (c) 150 (d) 160
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If 12 carpenters, working 6 hours a day, can make 460 chairs in 24 days, how many chairs will 18 carpenters make in 36 days, each working 8 hours a day?
(a) 1260 (b) 1320 (c) 920 (d) 1380
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400 persons, working 9 hours per day complete
th of the work in 10 days. The number of additional persons, working 8 hours per day, required to complete the remaining work in 20 days, is:
(a) 675 (b) 275 (c) 250 (d) 225
Answer Key:
(1)-d; (2)-b; (3)-b; (4)-c; (5)-b; (6)-c; (7)-b; (8)-b; (9)-d; (10)-b
