Saturday

November 1, 2014

November 1, 2014

Posted by **Lindsay** on Friday, November 23, 2012 at 12:01am.

What is the average speed for the whole journey?

- math -
**Steve**, Friday, November 23, 2012 at 5:21amtotal distance = 30+60 km

total time = 30/25 + 60/20 = 21/5 hr

avg speed = 90km ÷ 21/5 hr = 150/7 km/hr

**Answer this Question**

**Related Questions**

Math - One day we decided to dive from town A to town B. In order to get there ...

Math - A motorist took a total of 4hr to drive from town A to town C. He took ...

Maths - Karen took 1hour 45mins to drive from Town A to Town B. She took another...

math - One day we decided to drive from Town A to Town D. In order to get there ...

percentage - Karen took 1h 45m to drive from town a to town b.she took another ...

Math - One day we decidid to drive from town A to town D.In order to get there,...

Maths - At 9.30 a.m., a car left town X for town Y at a speed of 60km/h for the ...

geometry - On a map, Town A is 8 km due south of Town B, Town C is 9 km from ...

maths - A man travels from town a to b at an average speed of 90km/h.on his ...

Math - what value of m will make 4x-7y=5 and 9x+my=3 parallel? a car leaves town...