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Find the Cost of Polishing a Circular Table-top of Diameter 1.6 M, If the Rate of Polishing is Rs 15/M2. (Take π = 3.14) - CBSE Class 7 - Mathematics

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Question

Find the cost of polishing a circular table-top of diameter 1.6 m, if the rate of polishing is Rs 15/m2. (Take π = 3.14)

Solution

Diameter = 1.6 m

Radius =1.6/2 = 0.8 m

Area = 3.14 × 0.8 × 0.8

= 2.0096 m2

Cost for polishing 1 m2 area = Rs 15

Cost for polishing 2.0096 m2 area = 15 × 2.0096 = 30.14

Therefore, it will cost Rs 30.14 for polishing such circular table.

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APPEARS IN

 NCERT Solution for Mathematics for Class 7 (2018 to Current)
Chapter 11: Perimeter and Area
Ex. 11.30 | Q: 8 | Page no. 223
Solution Find the Cost of Polishing a Circular Table-top of Diameter 1.6 M, If the Rate of Polishing is Rs 15/M2. (Take π = 3.14) Concept: Circle - Area of Circle.
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