Question

a motorist travels along the boundary of a square field of area1476225 m^2 at 36km/hr he returns to starting point in

Answer 1

area of the square field = 1476225 m²
its side = √1476225 = 1215 m
its perimeter =( 4 * 1215) m = 4680 m 

Speed of the motorist = 36 km / hr = 10 m / sec

time taken = distance / speed = 4680 ÷ 10 = 468 sec

Answer 2

Area = 1,476,225 m² = 1.476225 km²
Side of the square field = √1.476225 = 1.215 km
Perimeter = 4.860 km

Time duration to travel the perimeter = perimeter length / speed
            = 4.86 km / 36 km/hr  = 0.135 hours = 8.1 minutes   ie, 8 min 10 sec