Question 1173682: The distance from the highway to Lake Snow was 160 km and Jacques made the trip in 11 hours.
For the first part of the journey he used a snowmobile and traveled at 20 km/h. The last part of the
trip was made on skis, where he averaged 10 km/h. How far did he travel on skis
Found 2 solutions by ewatrrr, MathTherapy:
Answer by ewatrrr(24785)   (Show Source):
You can put this solution on YOUR website!
Hi,
The distance from the highway to Lake Snow was 160 km and Jacques made the trip in 11 hours.
For the first part of the journey he used a snowmobile and traveled at 20 km/h.
The last part of the trip was made on skis, where he averaged 10 km/h.
How far did he travel on skis
Let t be the time traveled by snowmobile(the faster time)
and (11 - t) the time by snowmobile.
D = rt
20t + 10(11-t) = 160km
10t = 50
t = 5hr, the time by snowmobile. time by skis is 6hr 
(10mi/ht)(6hr) = 60mi, distance by snowmobile.
Checking our Work:
20t + 10(11-t) = 160km
100km +60km = 160km checks
Wish You the Best in your Studies.
Answer by MathTherapy(10555)  (Show Source):
You can put this solution on YOUR website! The distance from the highway to Lake Snow was 160 km and Jacques made the trip in 11 hours.
For the first part of the journey he used a snowmobile and traveled at 20 km/h. The last part of the trip was made on skis, where he averaged 10 km/h. How far did he travel on skis
Let distance on skis, be D
Then distance covered on snowmobile = 160 - D
We then get the following TIME equation: 
2D + 160 - D = 220 ------ Multiplying by LCD, 20
2D - D = 220 - 160
Distance covered on skis, or 
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