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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
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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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