A rectangular field is measured 290m by 210m. How long will it take for a girl to go two times round the field if she walks at the rate of 1.5 m / sec ?

The dimensions of the given rectangle are 290m×210m The perimeter of a rectangle is 2×l×b So the perimeter of this triangle is 2×290×210 = 121800m The girl goes around the field twice with a speed of 1.5m/sec Total distance = 121800×2 = 243600m So, as we know distance/time = speed Time = distance/speed Time = 243600/1.5 = 162400 sec which approximates to 45 hours