Qstnid -B-3- 36 Men Can Do A Piece Of Work In 7 Days. How Many Men Will Do The Same Work In 42 Days? - 10: Direct And Inverse Variations Class 8 Maths - Icse-viii-mathematics

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ICSE-VIII-Mathematics

10: Direct and Inverse Variations Class 8 Maths

with Solutions - page 2

Qstn# B-3 Prvs-Qstn Next-Qstn

#3
36 men can do a piece of work in 7 days. How many men will do the same work in 42 days?
Ans : Men : Days : : Men : Days
36 : 7 : : x : 42
∴ By inverse proportional
36 × 6 = x × 42
⇒ x = (36 × 7)/42 = 6 men