Question

= 60
Q. 5. The odometer of a car reads 57321.0 km when
the clock shows the time 8.30 a.m. What is the distance
moved by the car, if at 8.50 a.m., 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/hr also.​

Answer 1

Answer:

Initial reading of the odometer of the car = 57321.0 km

Final reading of the odometer of the car = 57336.0 km

Distance covered by the car = Final reading of the odometer of the car − Initial reading of the odometer of the car

= 57336.0 − 57321.0 = 15 km

The given car starts at 8:30 a.m. and stops at 8:50 a.m.

Therefore, time taken by the car to cover the distance is (8:50 − 8:30)min = 20 min Distance covered by the car = 15 km

Time taken by the car = 20 min Apply the formula for speed Speed=distance covered /time taken

=15/20=0.75km/m Again, 60 min

= 1 h 20 min=1/60×20=1/3hr

Time taken by the car =1/3hr Speed=distance covered /time taken=15/1/3=45km/hr.

Final answer is= 45km/hr

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