A man can walk a certain distance at a uniform speed in 100 days. How long will it take him to cover twice the distance at half the normal speed?
Earlier time = 100 days.
Distance is doubled and speed is reduced to half.
∴ time will become 2 × 2 i.e. 4 times.
Hence now it will take 100 × 4 = 400 days.
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A 100 m long 3 m high and 30 cm wide wall is built by 30 men, 20 women and 50 children working 9 hours a day in 20 days. How long a wall 1.5 m high 30 cm wide can be built by 15 men, 25 women and 35 children working 2 hour a day in 15 days (given men, women and children are equally efficient)? |
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18 men bind 900 books in 10 days. Find how many binders will be required to bind 600 books in 12 days? |
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A man can walk a certain distance at a uniform speed in 100 days. How long will it take him to cover twice the distance at half the normal speed? |
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