Question

The area pf the square field is $242$ sq. decameter. Find the exact time taken by a man to cross the field diagonally at the rate of $88$ metre per hour.

Answer 1

$88$ hectametre$=88\times 100$ m
$242$ sq. decametre $=242\times 100$ sq.m
Distance to be covered $=$ length of the diagonal
$==\sqrt{2\times 242\times 100}$ m
$=220$ m
Times taken, $=\frac{220}{88\times 100}\times 60$
$=1\frac{1}{2}$minutes