Problema Solution
Palmer's average running speed is 3km/h faster than his walking speed. If Palmer's can run around a 30-kilometer course in 2 h, how many hours would it take for Palmer to walk the same course?
Answer provided by our tutors
R = running speed
W = walking speed
d = distance
R = W + 3 km/h = 30 km / 2 hr = 15 km/hr
Solve for W (walking speed)
W = R - 3 km/h = 15 km/h - 3 km/hr = 12 km/hr
W = d / t = 30 km / t = 12 km/hr
Solve for t
t = d / W = 30 km / 12 km/hr = 2.5 hr