Question

Find the radius of a cylindrical water tank whose capacity is 6930cm cube.Its height is 20 cm.
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Answer 1

Radius of cylindrical vessel =7cm and height =12cm

∴ Volume =πr

2

h

=588π

Volume of vessel filled with water =

3

2

×588π=392π

Volume of sphere =

3

4

×π×216=288π

∴ Water spilled outside

=(392+288)π−588π=92π cm^3

therefore answer is 92π cm^3