Question

A 5m wide path runs along inside of a square park of side 120m. find the cost of paving the path at 1.50 rupees per sq.

Answer 1

area of path = area of outer square - area of inner square
= (120× 120) - (110×110)
= 14400-12100
= 2300 m^2
Now, cost of paving 1 m square equal to = Rs. 1.50
therefore cost of paving 2300 sq m
= Rs 1.50 × 2300
= Rs. 3450
hence the answer is Rs. 3450

Answer 2

=> Area of outer square = S$\times$ S

= 120$\times$120.
= 14400m²



=> Area of inside square = S$\times$S

= S $\times$S



=> Area of shaded part = 14400 – 12100

= 2300m²


So, Cost for 1m² = $ 1.50


➡ Cost for 2300m² = 2300$\times$1.50

= $ 3450