Maths Indirect proportion

If 22 men can build a wall of 110 metres in 10days . the length of a similar wall built by 30 men in 6 days is 90 m

explanation

22 men   110 metres in 10 days   ie means 11m in one day

22 men 11 m
30 men   ?

30*11/22 =  15

15 m was built by 30 men in one day so for 6 days they built 6* 15 = 90 metres


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