Question

the area of a square field is 17956 sq m. a man cycles along boundary at the speed of 18 km /hr. In how much time will he return to starting point if he takes 4 rounds

Answer 1

area of sq field = 17956 sq m

a^2. =17956

a= 134 m
total distance covers in 4 round =4×perimeter

=. 4*4*side

=16*134 m =2144 m

speed =18km/h. =18×5/18 = 5m/sec

time = distance/speed

= 2144/5 =428.8 sec = 7min 8.8 sec