Question

the rectangular field is3684m² and its length is 64 m. Aboy runs around the field qt the rate of 6km / h. How long he take to go 5times around it ?

Answer 1

Area of rectangular field = l×b
3684 = 64×b
3684/64 = b
b = 921/16

Perimeter of rectangular field = 2(l+b)
= 2 (64+921/16)
= 2 [(1024+921)16]
= 2 × 1945/16
= 1945/8

Distance of 5 round = 1945/8 ×5
= 9725/8

Time taken to cover this distance at 6km/h or 600 metre/min
= (9725/8)÷100
= 9725/800
= 12.15 min

Hope it helps