Question

10 boys can dig a pit in 12 hrs. how long will 8 boys have to do it ?
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Answer 1

Answer:

15 boys

Step-by-step explanation:

it is the case of inverse variation

so,

10×12÷8= 15

so answer is 15 boys

Answer 2

Answer:

15h

Step-by-step explanation:

Time taken by 10 boys to dig a pitch= 12 hours

Time is taken by 1 boy to dig a pitch =

12× 10= 120 hours ( less boys means more time )

Time taken by 8 boys to dig a pitch = 120/8

= 15 hours

I hope it will help you