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Question
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
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