Question

the odomoter of a car reads 57321.0 km when the clock shows the time 8:30 .What is the distance moved by the car , if at 8:50 am , the odometer reading has changed to 57336.0 km? calculate the speed of the car in km/min during this time express the speed in km/h also
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Answer 1

Answer:

initial reading- 57321.0 km

after moving some distance- 57336.0 km

distance travelled = initial - final reading

                              = 57321-57336 km

                              = 15 km

starting time= 8:30 am

ending= 8:50 am

time taken = 20 minutes (subtract starting time and ending time)

                  = 1/3 hr

in km/min

speed = dist/time

           = 15/20 km/min = 0.75 km/min

in km/h

speed = distance/time

            15/(1/3) km/h = 45 km/h. (convert 20 min to hours)