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If 12 boys earn Rs. 840 in 7 days, what ...

If 12 boys earn Rs. 840 in 7 days, what will 15 boys earn in 6 days?

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Given,
Earning of `12` boys in` 7` days =Rs. `840`
So`,1` boy in `7` days will earn
=Rs`840/12= 70` rupees
`1` boy will earn in `1` day
=Rs. 70/7
=10 rupees.
`therefore15 `boys will earn in `1` days
` =15*10=150 `rupees.
So, `15` boys will earn in `6 `days
`=6xx150=900`
Hence,` 15` boys will earn `900 `Rupees. in `6` days.
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