Answers

2016-02-24T18:45:14+05:30
You didn't give any cost of colouring per 1 cm so i can't find this answer 
plz check your question

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2016-02-24T19:11:23+05:30
See , the colouring of the curved surface area pencil = 37.5 Sq. cm . and as you did not give the cost of colouring one pencil or cost of colour Sq. cm , I can't give you the exact answer . you have to first find the cost of one pencil by simply multiplying the area and the cost and then multiply the number of pencil by the cost of one pencil .
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