Question

A man walking at the speed of 4kmph crosses a aquare field diagonally in 3 minutes.the area of the field is? In m^2​

Answer 1

his speed is 4kmph

or (4×5/18)= 10/9 m/s

now he cross diagonally in 3min or 3×60 sec then

s =d/t

d= s×t

d =10/9 ×180

d=200 m

diagonal =200

using pathagorus

if a is side of the square

then 200^2= 2a^2

10root2= a

area of square = a×a = 200m^2