A
metallic sphere of radius 10.5 cm is melted and then recast into small
cones each of radius 3.5 cm and height 3 cm. The number of cones thus
formed are ?
a) 129 b) 128 c) 132 d) 126 e) None of these
Answers and Explanations are welcome in comments
The Correct Answer will be Given Tomorrow
Answer and Explanation of Question No. 30
ReplyDeleteCorrect Answer is 126
Explanation : We have to just equate both volumes
Volume of Sphere is : 4/3(pie)r^3
Volume of cone is : 1/3(pie)r^2*h
So 4/3*22/7*(10.5)^3=1/3*22/7*3.5*3 * No of Cones
Solve it and you will 126 cones can be made from this sphere..