Question

The front compound wall of a house is decorated by wooden spheres of diameter

21 cm, placed on small supports as shown in Eight such spheres are

used forth is purpose, and are to be painted silver. Each support is a cylinder of

radius 1.5cm and height 7cm and is to be painted black. Find the cost of paint

required if silver paint costs 25 paise per cm2

and black paint costs 5 paise per

cm2

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Answer 1

Answer:

no.of 21cm =21

no.of 1.5cm=15

no.of 7 cm= 7

43