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January 28, 2015

January 28, 2015

Posted by **Lydia** on Monday, July 20, 2009 at 9:17pm.

- Mathematics -
**MathMate**, Monday, July 20, 2009 at 9:55pmDistance travelled for 1.5 hours at 30

= 1.5*30 km

= 45 km

Remainder of journey

= 91-45

= 46 km

Time required at 23 km/hr

= 46/23

= 2 hours

Total distance = 91 km

total time = 1.5 + 2 = 3.5 hours

Average speed

= 91/3.5 km/hr

=26 km/hr

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