Short Answer TypeThe inner diameter of a cylindrical wooden pipe is 24 cm and its outer diameter is 28 cm. The length of the pipe is 35 cm. Find the mass of the pipe, if 1 cm3 of wood has a mass of 0.6 g
(i) For tin can
l = 5 cm b = 4 cm h = 15 cm
∴ Capacity = l x b x h
= 5 x 4 x 15 cm3 = 300 cm3.
(ii) For plastic cylinder Diameter = 7 cm
Radius (r) = 
Height (h) = 10 cm
∴ Capacity = 
r2h
Clearly the second container i.e., a plastic cylinder has greater capacity than the first container i.e., a tin can by 385 – 300 = 85 cm3.
= 3.14)It costs र 2200 to paint the inner curved surface of a cylindrical vessel 10 m deep. If the cost of painting is at the rate of र 20 per m2, find
(i) inner curved surface area of the vessel,
(ii) radius of the base,
(iii) capacity of the vessel.
A patient in a hospital is given soup daily in a cylindrical bowl of diameter 7 cm. If the bowl is filled with soup to a height of 4 cm, how much soup the hospital has to prepare daily to serve 250 patients?
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