1.

Sixteen men, working at 6 h a day, can do a piece of work in 15 days. In how many days can 18 men working at 10 h a day do the same work?

Answer»

18
10
16
8

Solution : `"We have " (M_(1)D_(1)H_(1))/(W_(1)) = (M_(2)D_(2)H_(2))/(W_(2))`
`M_(1) = 16, D_(1) = 15, H_(1) = 6`
`M_(2) = 18, D_(2) = ? H_(2) = 10 " and " W_(1) = W_(2) = 1`
`(16 xx 15 xx 6)/(1) = (18 xx D_(2) xx 10)/(1)`
`rArr D_(2) = (16 xx 15 xx 6)/(18 xx 10)` = 8 days
Hence the correct option is (d).


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