Two pulleys are connected by a belt. The radii of the pulleys are 6 cm and 21 cm, and the distance between their centers is 30 cm. Find the total length of belt needed to connect the pulleys.

On her first stroke, maya hit a golf ball 146 yards, 2 feet, 11 inches. on her second stroke, she hit it 163 yards, 1 foot, 2 inches. how far did the ball go all together? convert the answer to larger units whenever possible.

Whats is the value of the variables ?

Me because i don't understand how to do it.: )