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CUET
General Test
Quantitative Reasoning
Mensuration: 2D
What will be the height of a cylinder whose radius is 7 cm and the total surface area is 968 sq cm ?
15 cm
17 cm
21 cm
25 cm
Total surface area = 2πr (h + r) 968 = 2 x\(\frac{ 22}{7 }\) x 7 (7+h)
968 = 44(7+h)
968 = 308 + 44h
44h = 660
h = \(\frac{660 }{44 }\)
h =15 cm