Question

a group uf 171 men could complete a peice of work in 56 day however,some soldier left the group the remaining workforce completed the work in 63 day how many men left the group

Answer 1

Let the no.of soldiers be x.
If 171 completes the work in 56 days then 171-x would complete the work in 63 days .
It is a case of inverse variation.
$171 \times 56 = (171 - x) \times 63 \\ 171 - x = 171 \times 56 \div 63 \\ 171 - x = 152 \\ - x = 152 - 171 \\ - x = - 19 \\ x = 19$
hence 19 soldiers left the group



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