A man is drivin his car from his office to his home at 50 km/h. Thirty minutes later he realiazed that he forgot some importatnt documents at the office. What constant speed he should drive the car so that he can return to the office within 12 minutes?
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Answer:
125km/h
he drives car with the speed of 50km/h
means 50km in one hour
so in half of hour 30 mints
he drives his car 25km.. half of 50km
now speed=distance/time
distance=25km×30mints
according to question give time 12mints
so speed= 25×30/12
=750/12
= 62.5 constant speed in 12mints for 25km
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