SOLUTION: Jose traveled for 2 hours at a rate if 70 kilometers per hour and for 5 hours at a rate of 60 kilometers per hour. what his average speed for the 7 hour period?

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Question 161967: Jose traveled for 2 hours at a rate if 70 kilometers per hour and for 5 hours at a rate of 60 kilometers per hour. what his average speed for the 7 hour period?


Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!

Average speed for 7 hours:
Total+Distance%2F+7+hours=%28d%5B1%5D%2Bd%5B2%5D%29%2F7, EQN 1
where,
d%5B1%5D=%2870km%2Fcross%28hr%29%29%282cross%28hrs%29%29=140km
d%5B2%5D=%2860km%2Fcross%28hr%29%29%285cross%28hrs%29%29=300km
Go back EQN 1,
Average+Speed=%28140%2B300%29%2F7=440%2F7=62.85km%2Fhr, ANSWER
Thank you,
Jojo