the area of a rectangular field is 3584m sq and its lenght is 64m. A boy runs around the field at the rate of 6 km/h. how long will he take to go 5 times around it?
Area of rectangular field = 3584
So breadth of rectangular field = m
Then, Perimeter of rectangular field =
Now a boy is running 5 times around the field. So total distance covered by a boy = m
Speed = 6km/h = m/s
So time taken by boy to cover the total distance =
therefore time taken by boy is 720 seconds.
let the breadth be 'x'
leght = 64 m
area of rectangular field = l * b
3584 = 64 * x
3584/64 = x
56 m = x
breadth = 56 m
perimeter of the field = 2(l+b)
= 240 m
speed of the boy = 6km/h
= 12 mins
the boy takes 12 mins to go 5 times around the field