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Find the volume of the cylinder if height (h) and radius of the base (r) are as given below. i. r = 10.5 cm, h = 8 cm ii. r = 2.5 m, h = 7 m iii. r = 4.2 cm, h = 5 cm iv. r = 5.6 cm, h = 5 cm |
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Answer» i. Given: r = 10.5 cm and h = 8 cm To find: Volume of the cylinder Volume of the cylinder = πr2h = (22/7) x 10.5 x 10.5 x 8 = 22 x 1.5 x 10.5 x 8 = 2772 cc ∴ The volume of the cylinder is 2772 cc. ii. Given: r = 2.5 m and h = 7 m To find: Volume of the cylinder Volume of the cylinder = πr2h = (22/7) x 2.5 x 2.5 x 7 = 22 x 2.5 x 2.5 = 137.5 cu.m ∴ The volume of the cylinder is 137.5 cu.m. iii. Given: r = 4.2 cm and h = 5 cm To find: Volume of the cylinder Volume of the cylinder = πr2h = (22/7) x 4.2 x 4.2 x 5 = 22 x 0.6 x 4.2 x 5 = 277.2 cc ∴ The volume of the cylinder is 277.2 cc. iv. Given: r = 5.6 cm and h = 5 cm To find: Volume of the cylinder Volume of the cylinder = πr2h = (22/7) x 5.6 x 5.6 X 5 7 = 22 x 0.8 x 5.6 x 5 = 492.8 cc ∴ The volume of the cylinder is 492.8 cc. |
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