Question

Eddy started his hike at an elevation of 115 feet below sea level. He hiked for 7 hours and reached an elevation of 1,812.1 feet. On average, what was his change of elevation every hour?

Answer 1

I think 260. Not sure though.

Answer 2

275.3 feet/hour

Explanation:

Let ground level be at 0 feet (sea level). Eddy starts at - 115 feet (below sea level) and hikes to +1812.1 feet. Eddy's distance hiked is:

(1812.1 feet -(-115 feet)) = 1927.1 feet hiked

This required 7 hours. His rate of elevation change would be (1927.1 feet/7 hours) = 275.3 feet/hour