Question

Kelsy climbs up a volcano. When she is a quarter of the way up the volcano she is at a height of 125 m. How high is Kelsy from the bottom when she is 75 m below the top of the volcano?

Answer 1

She is 425 feet above the sea level, or the starting level.  

Answer 2

To find the height, multiply 125 by 4 and subtract 75 to find 75m below the top
125 x 4-75=425m