Ex 13.7, 3
The height of a cone is 15 cm. If its volume is 1570 cm3, find the radius of the base. (Use Ο = 3.14)
Height of cone = h = 15 cm
Let radius of cone = r cm
Given
Volume of cone = 1570 cm3
1/3 Οr2h = 1570
1/3 Γ3.14Γπ2Γ15=1570
1 Γ3.14Γπ2Γ5=1570
r2 = 1570/(3.14Γ5)
r2 = 100
r = β100
r = β((10)2)
r = 10 cm

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

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