Mensuration Practice Test 10

Question : 24 of 40

Marks: +1, -0

The radius of a metallic cylinder is 3 cm and its height is 5 cm. It is melted and moulded into small cones each of height 1 cm with the base radius of 1 mm. The number of such cones formed is:

450
1,350
8,500
13,500

Validate

Solution:

Volume of the metallic cylinder =

πr^2 h

π(3)^2 .5

= 45π
Volume of the cone =

1/3π 1/{100} . 1

1/{300} π

Number of the cones =

{45π}/{{1π}/{300}}

{45π×300}/π

= 13,500 cones

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