Question

the length of and breadth of a playground are 18 and 35 M respectively how long will a boy take to go three times round the field if he walks at rate of 1.5 m per second

Answer 1

Answer:

l=18m

b=35m

perimeter =2×(18+35)=230m...{it will be lenght of track}

total distance covered by boy=230 ×3{rounds}=690m

speed=1.5m/s

time =distance/speed

so,

t=690÷1.5

460 seconds......

7minutes 40 seconds....

hope this helps.