Question

A biker’s speed is 1.5 times faster than a walker’s. They started simultaneously from the same point and in 1.5 hours the distance between them was 12.5 miles. What are their speeds, depending on whether they walked in the same or opposite directions?

Answer 1

let x=walker's speed

1.5x=biker's speed

1.5x-x=.5x=speed by which distance is formed

between biker and walker.

speed=distance/travel time

.5x=12.5/1.5

x=16 2/3

1.5x=25

walker's speed=16 2/3 mph

biker's speed=25 mph