Question

The area of a rectangular field is 3584m square abd its length is 64m .A boy runs around the field at the rate of 6km/h .How long will he take to go 5 times around it? please give the answer in full method . it is urgent!!!!!!!!!!!!!!!!

Answer 1

length × breadth = area
therefore breadth = area ÷ length
= 3584 ÷ 64
= 56 m
perimeter = 2 ( l + b)
= 2(64+56)
= 2 × 120
= 240 m
= 0.24 km
speed = distance ÷ time
therefore 6 = 0.24 × 5 ÷ t
t = 0.24 × 5 ÷ 6
t = 0.4 × 5
t = 2 hours

Answer 2

length=64m
Breath?
Area 3584m

So area of rec.=l×b
3584m=64×b
3584÷64=b
56m=b


Now Perimetre of rectangle=2 (l+b)
=2 (64+56)
=240m

In Km=
1000m=1km
240m=240÷1000
=2.4km

He runs6km/h

Speed=distance/time
6km/h=0.24km×5 (rounds)÷time
time=0.24×5÷6
time=20÷100
time=0.2hr