Question

A path of uniform width, 3m, runs around the outside of a square field of side 21m. Find the area of the path.

Answer 1

Area of path = area of (4 rectangle + 4 square)
= 4 ( l × b + s × s )
= 4 ( 21 × 3 + 3 × 3 )
= 4 ( 63 + 9 )
= 4 × 72
= 288 cm sq.