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