Question

Find the weight of an iron cylinder of height 20cm and radius of the base 10cm if 1 square centimetre of the iron weight 8 grams

Answer 1

Find the weight of an iron cylinder of height 20cm and radius of the base 10cm if 1 cubic centimetre of the iron weight 8 grams

Solution:

Volume of a cylinder is

$$V = \pi R ^ {2} H$$

The weight of cylinder is

$$W = \rho V$$ $$R = 10 \text{ cm}$$ $$H = 20 \text{ cm}$$ $$\rho = 8 \text{ gr/cm}^3$$

So the weight of cylinder is

$$W = 8 * \pi * 10^2 * 20 = 50,265 \text{ gr}$$

Answer: The weight of an iron cylinder is 50,265 gr.