# 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? - Mathematics

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?

#### 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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#### APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 10 Direct and Inverse Variations
Exercise 10 (C) | Q 10 | Page 126