Question

Sam plans to go by bus and walk back. If the speed of bus is 45 kms per hour and he can walk at the rate of 5 kms per hour, how far can he ride by bus if his total journey is of 12 hours?

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Solution

The correct option is **D**

54 kms

Let the total time Sam rode by bus is x hrs.

The distance covered by the bus = 45×x kms.

So, sam should be covering 45×x kms by foot in (12−x) hours.

And, the distance covered by Sam by walking = 5(12−x) hours

⇒5(12−x)=45×x

⇒60−5x=45x

x=65

∴ the total distance travelled by bus = (45×65)=54 kms

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