Dinanath walked 12 km at a certain rate of speed and then 6 km further at a rate of 0.5 km/hr faster. If he had walked the whole distance at a faster rate of speed, his time would have been 20 minute less. How long did Dinanath take to walk the distance of 18 km at his original speed?

Dinanath walked 12 km at a certain rate of speed and then 6 km further

1.	Dinanath walked 12 km at a certain rate of speed and then 6 km further at a rate of 0.5 km/hr faster. If he had walked the whole distance at a faster rate of speed, his time would have been 20 minute less. How long did Dinanath take to walk the distance of 18 km at his original speed?
A.	160 minutes
B.	200 minutes
C.	270 minutes
D.	320 minutes
E.	None of these
Answer» D. 320 minutes

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Dinanath walked 12 km at a certain rate of speed and then 6 km further at a rate of 0.5 km/hr faster. If he had walked the whole distance at a faster rate of speed, his time would have been 20 minute less. How long did Dinanath take to walk the distance of 18 km at his original speed?

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