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RS Aggarwal Solutions Class 10 Mathematics Solutions for Perimeter And Area Of Plane Figures Exercise 15B in Chapter 15 - Perimeter And Area Of Plane Figures

Question 4 Perimeter And Area Of Plane Figures Exercise 15B

A 36 m-long, 15m-broad verandah is to be paved with stones, each measuring 6 dm by 5 dm. How many stones will be required?

Answer:

Length of verandah = 36 m

Breadth of verandah = 15 m

Length of stones = 6 dm = 0.6 m

Breadth of stones = 5 dm = 0.5 m

Now,

Area of verandah = Length × Breadth

= 36 x 15

= 540

Area = 540 m^2

Area of stones = Length × Breadth

= 0.6× 0.5

= 0.3

Area of stone = 0.3 m^2

Number of stones = (area of verandah)/(Area of stones) = 540/0.3 = 1800

That is, number of stones required are 1800.

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