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Some iron beads are embedded in wax ball...

Some iron beads are embedded in wax ball which is just floating in water. The volume of ball is 18 `cm^(3)` and relative density of waxis 0.9 .Then mass of the iron trapped in the ball is

A

1.8 g

B

2.7 g

C

16.8 g

D

8.1 g

Text Solution

Verified by Experts

The correct Answer is:
A
Let the mass of iron trapped in the ball be m.
According to law of floatation ,
Weight = upthrust
(m + mass of wax)g `=18 xx 1xx g`
Ignoring the volume of iron since it is in the form of small beads
`therefore m+18 xx0.9-18xx1` or `m=1.8 g`
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