Question

10. The length and breadth of a playground are
80 m and 40 m respectively. How long will a
boy take to complete 6 rounds of the ground
if he walks at the rate of 2 m/s?​

Answer 1

Answer:

720 seconds

Step-by-step explanation:

Given length of playground = 80 m

width of playground = 40 m

Perimeter (length of boundary) = 2(l+b)

=2(80+40)

=2 ×120

length of boundary = 240 m

For 6 rounds length = 240×6= 1440m

now time taken to boy to cover 2 m = 1 sec

then time taken to cover 1440 m =   1440/2 =720

∴ Time taken to complete 6 rounds of field is 720 seconds.