Question

The area of a rectangular field is 2592 aq.M and it's length is 54m. A boys runs around it at the rate of 4km/hr. In how much time will he go 5 times around it?

Answer 1

Answer:

Area of rectangular field=2592m²

=l×b=2592m²

=54m×b=2592m²

=b=2592m²/54m

=b=48m

Since the boy runs around it,

distance= perimeter of rectangle

= 2(l+b)

=2(54m+48m)

=204m

Speed of boy=4km/hr

=distance/time=4km/hr

=204m/time=(4×1000m)/(60×60s)

=204m/time=10m/9s

=time=204m/(10m/9s)

=time=204m×9s/10m

=time =183.6 seconds

Time taken to run 5 times around it:

=5×183.6 seconds

=918 seconds

=15.3 minutes