Question

A cylindrical wooden column is 3 m high and 28 cm in diameter use value π to calculate the mass in kf of the column if the density of the wood is 0.8g/cm^3

Answer 1

1.478 kg

Explanation:

Considering density=mass/volume, when we rearrange, we get mass=density*volume. Therefore, as we are given the density, we just need to find the volume to know the mass. The volume of a cylinder is πhr^2, and our radius is 28/2=14, so the volume of the cylinder is π*3*14^2=588π. Then, 588π*0.8=470.4π which is about 1477.8052 g. Then, to convert to kg, we can divide this by 1000 and get about 1.478 kg.