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CBSE Class 9 Answered

A concrete pillar 15 m high has a cross section which is square of side 3 m. Find the cost of painting its top and four walls at the rate of Rs 4 per m2.
Asked by Topperlearning User | 23 Aug, 2017, 12:58: PM
answered-by-expert Expert Answer

Given:  length (a) =3 m, breadth (a) =3 m and height(k)=15 m

Area of four walls and top

=

=

Cost of painting 1 m2 = Rs 4

Therefore, cost of painting 189 m2 =Rs {189×4}

                                                            =Rs 756

Answered by | 23 Aug, 2017, 14:58: PM
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