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August 2, 2014

August 2, 2014

Posted by **Rezu** on Thursday, March 29, 2012 at 7:16pm.

She walks 18km in total.

- Math (Grade 9) -
**Steve**, Friday, March 30, 2012 at 10:41amusing u,d,f for uphill, downhill, flat distances on the outward journey,

recall that time = distance/speed

she walks 9 km in each direction

(u/2 + f/3 + d/6) + (d/2 + f/3 + u/6) = 6

2u/3 + 2f/3 + 2d/3 = 6

u + f + d = 9

you are correct. the round trip is 18 km.

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