Question

The area of a rectangular field is 3584 m^2and its length is 64 m. A boy runs around the field at the rate of 6 km/h. How long will he take to go 5 times around it?​

Answer 1

given area of rectangle =3584m²2

length of rectangle = 64m

breadth of rectangle = area÷length

                                    =3584÷64

                                     = 56m

perimeter of rectange = 2(l+b)

                                       =2(56+64)

                                        =2(120)

                                         240m

it is given that boy runs at the speed of 6km/h

so according to statement,

boy runs 6km in 1h

               6000m -------- 60min

                  1m --------- (60÷6000)min  = 1/100 min

                  240m -------- 240×(1/100)  = 2.4 min

∴ he runs 1 time around the  field in 2.4 min

and in 5 times he run in 5×2.4 = 12min