Agroup of tourists went on three hikes with a distance of 12.5 km, 18 km, and 14 km. their speed on the first hike was 1km/hour slower than their speed on the second hike and 1 km/hour faster than their speed on the third hike. the third hike took 30 minutes longer than the second hike. how long did all three hikes take?

did u ever get the answers? i need

8.75

how-to:

first, we need to find what we have to work with.

since i know that we have 7 (years) and 0.8 (inches), we can use these to solve and find the equation!

secondly, what you want to do, is see that we need to know how much growth out of the 0.8 inches he got in only 1 year, instead of 7 years.

let's try to divide.

7 ÷ 0.8 = 8.75