Question:A woker may claim `15` p for each km which he travels by taxi and `5`p for each km which he drives his own car.If in one week he claimed Rs `5` for travlling `80`km how many kms did he travel by taxi ? 

A `10` 
B `20` 
C `30` 
D `40` 

+ Answer
A 

+ Explanation
Let the distance covered by taxi be x km

Then, distance covered by car `= (80 - x)` km.

`15/100 (x) + 5/100 (80 - x) = 5`

or `(3x)/20 + (80 - x)/20 = 5`

or `3x + 80 -x = 100`

or `x = 10 km`

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Irin Moni

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