Question

Length and breadth of a rectangular garden are 90 m and 75 m respectively. A 5 m wide road is to be built around it. Find the area of
the road. Also find what will be the cost of levelling this road at the rate Rs 2 per square metre?​

Answer 1

Step-by-step explanation:

area of road =2a(l+b+2a)=2×5(75+90+10)=10×175

cost =10×175×2=3500

Answer 2

Step-by-step explanation:

Area of original garden = 90 * 75 = 6750 m2

After path is added around rectangle, new length = 90 + 2*5 = 100 m

new breadth = 75 * 2*5 = 85 m

Area of rectangle with path = 100 * 85 = 8500 m2

So area of path = Area of rectangle with path - Area of rectangle without path

Area of path = 8500 - 6750 = 1750 m2