Mathematics, 05.01.2021 16:50 salam4704

A road has a gradient of 1/15 for 90 m. Then there is a horizontal section 130 m long.
The final section has a gradient of 1/25 for 200 m.
a. Find the total height gained from start to finish.
b. What is the average gradient from start to finish?

I did the first part of the question and got 14 m which is right but then I don't understand the second part (b.) Could someone explain it to me, please?

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A road has a gradient of 1/15 for 90 m. Then there is a horizontal section 130 m long.
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