Question

The area of a square field is 291600m2.a boy cycles along its boundary at 0.91 km/hr.in how much time will he return to the starting point?

Answer 1

area of square field

=291600 m^2=291.6 km^2

πr2 = 291.6 km^2

r^2 = 291.6 /3.14

r^2 = 92.8

r =9.6 km

distance=circumference of circle= 2πr

=2×3.14 × 9.6 = 60.288 km

given speed = 0.91 km / h

Time = distance / speed

Time = 60.288 / 0.91

Time = 66.2 h = 2days 18.2 h

therefore he will return to the starting point in 2days and 18.2 hours.
______________________________
Your Answer : 2days 18 h( approximate )
______________________________