Question

3. The area of the rectangular field is 2592 sq. m and its length is 54 m. A boy runs around it at the rate
of 4 km/hr. How long will he take to go 5 times around it?




Answer will be 15.3min​

Answer 1

Answer:

15.3 min

Step-by-step explanation:

Given length is 54 m

Area of rectangle = l*b

2596 = 54*b

b=48

Perimeter of the rectangle = 2(l+b)

2(54+48)=204 sq.m

A boy runs around the rectangle at the rate of 4 kmph

speed 's'= 4kmph

convert kmph to meter per secs

4 kmph = 4*5/18 mps

Speed = Distance /Time

Time = Distance /speed

        =204*18/20

        =183.6 secs

for 1 round 183.6 secs

for 5 round (5*183.6) = 918 sec

Ans in mins so 918/60 = 15.3 min