Question

13. Arun noted down the odometer reading of his car at different times of journey during his motion from place A to place B. What was the average speed of his car? Time Odometer reading 8.00 a.m 25555 km 8.30 a.m 25585 km 9.00 a.m 25645 km 9.30 a.m 25700 km 10.00 a.m 25725 km B. 90 km h- A. D. 100 km h- C. in travels the first 85 km h- 95 km h-​

Answer 1

Answer:

The initial reading of the odometer of the car =57321.0 km

The final reading of the odometer of the car = 57336.0 km

The car starts at 8:30 AM and stops at 8:50 AM.

Distance covered by car = (57336 - 57321) km = 15 km

Time taken between 08:30 AM to 08:50 AM = 20 minutes = 20/60 hour = 1/3 hour

So Speed in km/min

Speed = (Distance travelled)/ (Time)

= (15km)/ (20min)

= 0.75km/min

Speed in km/h Speed = (Distance travelled)/ (Time)

= (15km)/ (1/3h)

= (15 x 3) km/ (1h)

= 45km/h