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March 3, 2015

March 3, 2015

Posted by **Larry** on Saturday, January 12, 2013 at 4:55pm.

- math -
**Reiny**, Saturday, January 12, 2013 at 5:43pmtotal time at 20 km/h = 40 km/ 20 km/h

= 2 hours

time of 1st part = 10/30 = 1/3 hr = 20 minutes

time of 2nd part = 30/15 = 2hours

for a total of 2:20 hrs

so it would take him 20 minutes extra

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