Question

Supriya runs a marathon race in 50 minutes at an average speed of 48 km/hour. In order to set a national record, she needs to win the race in 40minutes. Considering that her speed remains constant, at what minimum speed should she run to set the record

Answer 1

60km per hour

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Answer 2

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/hr