Question

Area of square field is 8 hectares. How long would a man take to cross a diagonally by working at the rate of 4 kilo mph?

Answer 1

$1hectare=10,000m^2$

$80,000m^2⟹side=2\sqrt{2}\times 100m$

$⟹$ Diagonal $=400m$

so the man can cross in $6$min