Question

find the time taken by a boy to run around a rectangular field with length 25 and breadth is 15 M if he runs at a speed of 7.2 km per hour

Answer 1

Given

Length =25m
Breath =15m
Speed =7.2km/h

The boy running around the field so we need to calculate Perimeter of field

Perimeter of rectangle =2(l+b)

=2(25+15)

=2x40

=80m


Changing speed in m/s (multiple 7.2km/hr with 5/18)

Speed=7.2x5/18

=2m/s

Time taken by boy=80/2 =40 seconds

This is ur ans hope it will help you