Question

Supriya runs a marathon race in 15 minutes at the place of speed 48 km per hour in order to set a national record

Answer 1

Answer:

60 km/hr

Explanation:

Distance = Speed x Time

Here distance will remain same.

Earlier Speed x Earlier Time = 'Speed to set the record' x New Time

48 km/hr x 50 min  =  'Speed to set the record' x 40 min

Therefore, Speed to set the record = 50 x 48 / 40

Speed to set the record = 60 Km/h

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cRAZY pRINCE

Answer 2

heya...

60km/hr is the answer.