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
<pre>Let distance on skis, be D
Then distance covered on snowmobile = 160 - D
We then get the following TIME equation: {{{matrix(1,3, D/10 + (160 - D)/20, "=", 11)}}}
2D + 160 - D = 220 ------ Multiplying by LCD, 20
2D - D = 220 - 160
Distance covered on skis, or {{{highlight_green(matrix(1,4, D, "=", 60, km))}}}