Find the volume of a cylinder correct to 1 decimal place if its diameter is $2$2 cm and its height is $19$19 cm.

Find the volume of a cylinder with radius $7$7 cm and height $15$15 cm, correct to 2 decimal places.

Calculate the volume of the solid correct to 1 decimal place.

Consider the halfpipe with a diameter of $7$7 cm and a height of $16$16 cm.