Bert is 165 kilometers away from Brenda Both begin to walk t

Bert is 16.5 kilometers away from Brenda. Both begin to walk toward each other at the same time. Bert walks at 2.5 kilometers per hour. They meet in 3 hours. How fast is Brenda walking?

Solution

let b = Brenda\'s walking speed
:
Write a distance equation: dist = speed * time
:
Br\'s dist + Be\'s dist = 16.5 km
3b + 3(2.5) = 16.5
3b + 7.5 = 16.5
3b = 16.5 - 7.5
3b = 9
b = 3 km/hr is Brenda\'s speed
:
:
check:
3(3) + 3(2.5 ) = 16.5