Question

A man crosses a diagonal of square in 2 minutes at the speed of 6km/h . find the area of the square

Answer 1

2mins=2/60 hours
=1/30h
Now:
Speed of the boy:6km/hr
Distance travelled=length of diagonal=speed×time
=1/30×6
=1/5kms
=0.2kms
Let length of one side be 'x'
ATQ:
Length of side × square root of 2= 0.2kms
Therefore....
Length of the side=0.2/square root of 2
And Area Of a Square=Side×Side
=(0.2/square root of two)^2