miles per hour. Charlie left 1 hour later, biking at a rate of 20 miles per hour. How long will it take Charlie to catch up to Bernie?

Let t be the number of hours it takes Charlie to catch up with Bernie.

Given:

For Charlie

time = t

speed = 20mph

For Bernie, he has started 1 hour earlier

Given:

time = t + 1

speed = 15mph

Hence, to get the time it will take for Charlie to catch up, we equate the distance both of them covered

Therefore, it will take Charlie 3hours to catch up with Bernie.

518,400

step-by-step explanation:

the area is multiplying all the given measurements together.

40 * 18 * 30 * 24 = 518,400