Question

The area of a square field is 60025(m^2) .A man cycles along its boundary at 18 km/hr .In how much time will he return at the starting point ?

Answer 1

Length of side of square field = ✓area of square field
$= \sqrt{60025}$
$= 245$
Total distance
$= 4 \times 245$
$= 980$
Now,
980m
$= 980 \times {10}^{ - 3} km$
$= 0.98km$

speed=distance/time
time=distance/speed
$time = \frac{0.98}{18}$
$= 0.054 \: hr$
$= 0.054 \times 60 \times 60 \: seconds$
$= 196 \: seconds$