Li ( ly + sa ) = ?

What property is used ?

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Abouncy ball is released from a certain height. on the first bounce, it travels 32cm. with each subsequent bounce, it travels 9/10 the distance of the previous bounce. what is the total distance that the ball has traveled when it completes its 25th bounce?

If you could answer these your a life saver