a car has to cover a distance of 100 km in 1 hour 50 minutes, if it travels for the first 36 kilometres at 72 km per hour, at what speed must it travel for the rest of the distance in order to complete the journey in time.
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Time taken till now for 36 km =distance /speed
=36/72=0.5 hour
=30 minutes are completed.
Time left =1 hour 20 minutes = 4/3 hours
Distance left = 64 km
Speed =Distance /time
= 64/(4/3) = 48 km
=36/72=0.5 hour
=30 minutes are completed.
Time left =1 hour 20 minutes = 4/3 hours
Distance left = 64 km
Speed =Distance /time
= 64/(4/3) = 48 km
RisingFlame:
is the answer correct
??
no
then whats it ?
tell me so that i can check and correct it
48km/hr
now its correct
sorry time left was incorrect.
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