Question

a old boy runs 4times around a rectangle field with length and breadth 1km and 850m find the total distance covered by him

Answer 1

given,
length of the rectangle = 1 km = 1000m
and, breadth of the rectangle = 850 m

total distance covered = 4×perimeter of rec.
so,
distance covered = 4×2(L+B)

= 4×2(1000+850)
= 8× 1850
= 14800m

hence the distance covered by him is 14800m.