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A boy goes on his bike which is running at 60 km/hr to meet his girlfriend who is 300 km away. After 30 min he remember he forget his purse. He goes back to his house to get the purse. When he is coming back he was stopped by police he met after leaving home for 1 hour because he doesn’t have the license and so he goes back to his home to get the license. Then he realises that he will not reach on time, so he increases the speed when he is coming back from home. Find the new speed in which he met his girlfriend on time.

A boy goes on his bike which is running at 60 km/hr to meet his girlfriend who is 300 km away. After 30 min he remember he forget his purse. He goes back to his house to get the purse. When he is coming back he was stopped by police he met after leaving home for 1 hour because he doesn’t have the license and so he goes back to his home to get the license. Then he realises that he will not reach on time, so he increases the speed when he is coming back from home. Find the new speed in which he met his girlfriend on time. Correct Answer 150 km/h

Given:

Original speed of bike = 60 km/h

Distance = 300 km

Formula used:

Speed = Distance/Time

Concept:

Time left = Total Time – Time wasted

New Speed = Total distance/Time left

Calculation:

Time Taken = Distance/Time

Time Taken = 300/60

Time Taken = 5 Hour

Time wasted when he goes back because he forgets the purse is 60 min and time wasted when he was going back and when he met with the police is 2 Hour.

Total Time wasted = 1 + 2 = 3 Hour

Time Left = Total Time – Time wasted

Time Left = 5 – 3 Hour

Time Left = 2 Hour

Distance need to travel is 300 km

New Speed = Distance/Time Left

New Speed = 300/2

New Speed = 150 km/h

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