Chain Rule
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Chain Rule
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25 Questions

1. If 22.5 m of a uniform rod weighs 85.5 kg , what will be the weight of 6m of the same rod?
2. If the wages of 6 men for 15 days be Rs.2100, then find the wages of for 12 days.
3. 8 women can complete the work in 10 days and 10 children take 16 days to complete the same work. How many days will 10 women and 12 children take to complete the work ?
4. In a race, Nehal covers 5 km in 20 minutes, what distance will he cover in 50 minutes?
5. On a scale of map 1.5cm represents 24km. If the distance between two points on the map is 76.5 cm, the distance between these points is:
6. If 8 men working 9 hours a days can construct a road 18m long, 2 m broad and 12m high in 10 days, how many men are needed to construct a road 32m long , 3m broad and 9m high by working 6 hours a days, in 8 days?
7. If 20 men can build a wall 66 metres long in 6 days, what length of a similar can be built by 86men in 8 days?
8. A garrison of 3300 men had provisions for 32 days, when given at the rate of 860 gns perhead. At the end of 7 days, a reinforcement arrives and it was for that the provisions will last 17 days more, when given at the rate of 826 gms per head, What is the strength of the reinforcement?
9. If 18 pumps can deliver 2170 tonnes of water in 10 days , running 7 hours a day , in how many days will 16 pumps can deliver 1736 tonnes, running 9 hours per day?
10. If 36 men can do a work in 25 days, in how many days will 15 men can do it?
11. If 15 men, working 9 hours a day, can reap a field in 16 days, in how many days will 18 men reap the e-field, working 8 hours a day?
12. If 20 men can construct a road 112m long in 6 days, what length of a similar road can be construct by 25 men in 3 days?
13. 8 men can finish a work in 40 days . If 2 more men join them , then the same work will be finished in-
14. A rope makes 140 rounds of the over a cylinder, the radius of which is 14cm How many rounds will it cover over cylinder of radius 20 cm?
15. If 6 engines consume 15 metric tonnes of coal when each is running 9 hours a days , how much coal are needed for 8 engines, each running 12 hours a days, it being given that 3 engines of former type consume as much as 4 engines of latter type?
16. A contractor employed 30 men to do a piece of work in 38 days. After 25 days he employed 5 men more and the work was finished one day earlier. How many days , he would have been behind , if he had not employed additional men?
17. A 6m tall pole casts a 4m long shadow. At the same times, another pole casts a 50 m long shadow. How long is the second pole?
18. A contract was to be completed in 56 days and 104 men were set to works, Each working 8 hours per days. After 30 days , 2/5th of the work is completed. How many additional men are needed so that the work completes in time, each man now working 9 hours a day?
19. 5 men or 9 women can do a piece of work in 19 days. In how many days will 3 men and 6 women do it?
20. 400 persons working 9 hours per day complete 1/4th 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:
21. 10 pipes of the same capacity can fill a tank in 24 minutes. If 2 pipes are removed , how long will the remaining pipes take to fill the tank?
22. 6 dozen eggs are bought for Rs 48. How much will 132 eggs cost?
23. Two persons can complete a piece of work in 9 days. How many more persons are needed to complete double of the work in 12 days?
24. If 15 toys cost Rs, 234, what do 35 toys cost?
25. Four examiners can examine a certain number of papers in 10 days by working for 5 hours a day. For how many hours in a day can 2 examiners have to work in order to examine twice the number of papers in 20 days?

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