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A concrete sphere of radius R has cavity...

A concrete sphere of radius `R` has cavity of radius `r` which is packed with sawdust. The specific gravities of concrete and sawdust are respectively `2.4 and 0.3` for this sphere to float with its entire volume submerged under water. Ratio of mass of concrete to mass of swadust will be

A

`8`

B

`4`

C

`3`

D

Zero

Text Solution

Verified by Experts

The correct Answer is:
B
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