Rani start the car the odometer shows 3240 after 2 hours when see odometer it shows 3310 . find the speed hour per second.
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Reading of odometer:-
Before start=3240 unit
After 2 hrs.=3310 unit
thus,dist. travelled in 2 hrs. =(3310-3240)units
=70 units
therefore speed (in km/hr.) = 70/2 = 35 km/h
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