A wooden ball has a radius of $3.5$ cm. The density of the wood is $0.9 g m$ per $c m^{3}$ . Find the mass of the wooden sphere.

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Solution

Volume of ball $V = \frac{4}{3} π r^{3}$
$= \frac{4}{3} π \times (3.5)^{3} = 179.503 c m^{3}$

Density $= \frac{m}{V}$

$⟹ M = 0.9 \times 179.503 = 161.553 g m$

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A wooden ball has a radius of 3.5cm. The density of the wood is 0.9gm per cm3. Find the mass of the wooden sphere.

Volume of ball V=43πr3=43π×(3.5)3=179.503 cm3Density=mV⟹M=0.9×179.503=161.553 gm

A wooden ball has a radius of $3.5$ cm. The density of the wood is $0.9 g m$ per $c m^{3}$ . Find the mass of the wooden sphere.

Volume of ball $V = \frac{4}{3} π r^{3}$
$= \frac{4}{3} π \times (3.5)^{3} = 179.503 c m^{3}$

Density $= \frac{m}{V}$

$⟹ M = 0.9 \times 179.503 = 161.553 g m$