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

Some iron beads are embedded in wax ball which is just floating in wat

1.	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
Answer» 1.8 g 2.7 g 16.8 g 8.1 g Solution :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`