SOLUTION: A Cyclist covers a certain distance in 3.5 hours.If first half of the journey is covered in 20 km/hr and the rest of the journey in 15 km/hr,find the total distance of the whole jo

Question 781727: A Cyclist covers a certain distance in 3.5 hours.If first half of the journey is covered in 20 km/hr and the rest of the journey in 15 km/hr,find the total distance of the whole journey.
PLease help me!!
THE answer is:60 km
Answer by josgarithmetic(39625) (Show Source): You can put this solution on YOUR website!
r*t=d for rate multiplied by time equals distance.
t=d/r and we have the d cut into .

First half: , hours
Second half: , hours

The sum of those times must be 3.5 hours.

As You Were Told as Key.
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