A regular hexagon is constructed in a circle of radius $5 \mathrm{cm}$ . Calculate the perimeter of the hexagon. Give your answer upto a suitable degree of accuracy.

Find the length of chord $JK$. Give your answer to $1$ decimal place. [Enter the value excluding units]

Find the length of chord $LM$. Give your answer to $1$ decimal place. [Enter the value excluding units]

The sector $AOB$ is one third of the circle. Find the length of chord $AB$. Give your answer to $1$ decimal place. [Enter the value excluding units]

Find the area and circumference of the following circle. Give your answers in terms of $\pi$.

Find the area and circumference of the following circle. Give your answers in terms of $\pi$.

Find the area and circumference of the following circle. Give your answers in terms of $\pi$.

Find the length of the major arc.

Calculate the volume of this solid. The end face is a sector of a circle, radius $4 \mathrm{cm}$.