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1.Afactorymanufactures 120000 pencilsdaily. The pencils are cylindrical in shapeeach of length 25 cm and circumference ofbase as 1.5 cm. Determine the cost ofcolouring the curved surface of the pencilsmanufactured in one day at 0.05 perdm2 INCERT Exemplar Problem)0 |
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Answer» Number of pencils manufactured in one day = 1,20,0001 decimeter(dm) = 10 centimeter(cm)length = 25cm = (25/10) dm = 2.5 dmcircumference = 1.5cm = (1.5/10) dm = 0.15dm curved surface area= circumference× length = 2.5×0.15 dm² =0.375 dm²curved surface area of all pencils = 0.375×1,20,000 = 45,000 dm²cost of colouring = Rs.0.05 per dm²total cost = 0.05×45,000 = Rs. 2250 thanku |
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