Sum

50 labourers can dig a pond in 16 days. How many labourers will be required to dig another pond, double in size in 20 days?

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#### Solution

In 16 days for diging pond labour reqd.

In 1 day, labour reqd. = 50 × 16

In 20 days, labour reqd. = `(50xx16)/20`

In 20 days, with double work, labour reqd.

`=(50xx16xx2)/20`

= 5 × 8 × 2

= 80

Hence labourers required = 80

Concept: Concept for Unitary Method (With Only Direct Variation Implied)

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