Question

If the length of the cylinder is measured as 25 mm, the diameter is 3.09cm and mass of the cylinder is measured as 50.0 gm find the density of the cylinder in proper significant figures.(in $gm/c{m}^3$)

• A. 2.700 $gm/c{m}^3$
• B. 2.7 $gm/c{m}^3$
• C. 0.27 $gm/c{m}^3$
• D. 2.70$gm/c{m}^3$

Answer 1

Answer: (B)

2.7 $gm/c{m}^3$

$p=\frac{m}{\pi \left(d^2/4\right)h}$
$p=\frac{\left(50.0\right)gm}{3.14\times (3.09/2{)}^2\times (25\times {10}^{-1})c{m}^3}=2.7gm/c{m}^3$
(in two S.F.)