NumericalModerate2 marks
9(iii)
A solid wooden toy is prepared by joining a cone, a cylinder and a sphere, as shown in the given diagram. The radius of each of the three solids is 7 cm and heights of each of the cone and the cylinder is 24 cm. Find :
the cost of painting the total surface at the rate of ₹0.50 per cm.
Topic: Mensuration
Previous-year question practice database
Answer
Exam answer
Cost = 2684 × ₹0.50 = ₹1,342.
Answer: ₹1,342.
Explanation
Multiply the area from part (a) by the painting rate per cm².
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