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December 27, 2014

December 27, 2014

Posted by **Sindy** on Sunday, April 18, 2010 at 8:54pm.

X rides at 30 km/h, Y at 20 km/h. If they meet after t hours, find when and where they meet.

- Maths -
**Reiny**, Sunday, April 18, 2010 at 9:07pmlet the distance travelled by X be x km

then the distance travelled by Y has to be 40-x km

time taken by X = x/30

time taken by Y = (40-x)/20

but when they meet, they both took the same time, so

x/30 = (40-x)/20

take over ...

- Maths -
**Sindy**, Sunday, April 18, 2010 at 9:12pmThanks!

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