Question

the odometer of a car raid 4000 kilometre at the start of a trip and 4400 kilometre at the end of the trip if the trip to 8 hours calculate average speed of the car in kilometre per hour...plz help me​

Answer 1

Given :

▪ Initial reading = 4000km

▪ Final reading = 4400km

▪ Time of journey = 8hr

To Find :

➜ Average speed of car. (in kmph)

Concept :

➨ Average speed is defined as the ratio of total distance travelled to the total time taken.

➨ It is a scalar quantity having only magnitude.

➨ It can't be negative or zero.

➨ SI unit : m/s

Calculation :

⇒ Vav = d² - d¹ / t

⇒ Vav = (4400 - 4000) / 8

⇒ Vav = 400/8

⇒ Vav = 50kmph

Answer 2

Given :-

• Initial reading = 4000 km
• Final reading = 4000 km
• Time of journey = 8 hours.

To find :-

• Here we have to find average speed of car in (kmph)

Average speed :- It is define as the ratio of total distance travelled to the total time taken.

Calculation :-

→ Vav = final distance - initial distance / t

→ Vav = 4400 - 4000 / 8

→ Vav = 400 / 8

→ Vav = 50 kmph.

Average speed = 50 kmph.