Question

A rectangular field is 75 m by 50 m .vaani walksbround it at the rate the rate of 3 km per hour.what time will he take in completing 3 rounds.

Answer 1

perimeter of field=2 (75+50)=250 m
distance for 3 round =250×3=750 m
speed=3km/h=5/6m/s
time=750/5/6=750×6/5=900 seconds