Question

A garden is 120m long and 85m wide. It has an inside path of uniform width 3.5m all around it. The remaining part of the garden is covered by grass. Find the cost of the covering the garden by grass at 50 paise per square metre.

Answer 1

Area of a path around a rectangle = AB - ab
A and B are the sides of the outer rectangle
a and b are the sides of the inner rectangle
[120 cm * 85 cm]-[(120-3.5)*(85-3.5)]
=10200-[116.5*81.5]
=10200-9494.75
=205.25
Now to find the cost:
205.25*50 paise
=1026250 paise or 10262.50 Rs.