SOLUTION: A man completed a trip of 136 km in 8 hrs. Some parts he covered in 15km/hr and some parts he covered in 18km/hr. What is the part he covered in 18km/hr ?

Question 887423: A man completed a trip of 136 km in 8 hrs. Some parts he covered in 15km/hr and some parts he covered in 18km/hr. What is the part he covered in 18km/hr ?
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
Let x km = the part he covered in 15 km/hr
This means 136-x km = the part he covered in 18 km/hr
Since time =
==> time traveled in 15 km/hr is ,
and time traveled in 18 km/hr is
=>
<=>
=>
<=>
=> x = 40 km
=> 136-x = 96 km.
Therefore he covered 96 km traveling at the rate of 18 km/hr
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