Question

The odometer of a car reads 3000km at the start of a trip and 3500km at the end of trip.If the trip took 10hrs calculate the average speed of the car in km per hour and meter per hour

Answer 1

Answer:

50 km/hr and 50,000 m/hr

Explanation:

Given :

• Initial reading of the odometer of the car = 3000 km

• Final reading of the odometer of the car = 3500 km

• Time taken = 2 hours

To find :

• Average speed of the car in km/hr and m/hr

Average speed in km/hr:

$average \: speed \: = \frac{total \: distance}{total \: time}$

Total distance = 3500-3000

Total distance = 500 km

$average \: speed \: = \frac{500}{10}$

$average \: speed \: = 50 \: \frac{km}{h}$

The average speed of the car is km/hr is 50

Average speed in m/hr:

Distance covered in metres = 500×1000 = 5,00,000 metres

$average \: speed \: = \frac{500000}{10}$

Average speed = 50,000 metres/hr

The average speed of the car is m/hr is 50,000

Answer 2

Given:

• Initial distance = 3000 km

• Final distance = 3500 km

• Time taken,t = 10 hours

To be calculated:

Calculate the average speed in km per hour and metre per hour.

Solution:

Distance = initial distance - Final distance

= 3000 - 3500

= 500 km

Now,

Case I :

• Distance = 500 km

• Time = 10 hours

Average speed = Distance/Time

= 500 km / 10 hrs

= 50 km/h

Case II :

• Distance = 500 km

⇒ 500 × 1000

⇒ 500000 m

• Time = 10 h

Average speed = Distance/Time

= 500000 m / 10 h

= 50000 m/h