Question

odometerof a car rates 1560 kilometre while starting from a point and 1670 kilometre when it returns .if the car used 2 hour to return what is the average speed for journey?​

Answer 1

Answer:

55 km/hr

Explanation:

Given :

• Initial reading of the odometer = 1560 kilometres

• Final reading of the odometer = 1670 kilometres

• Time taken = 2 hours

To find :

• Average speed of the car

Average speed = total distance / total time

Total distance = 1670-1560

Total distance = 110 km

Total time = 2 hours

Average speed = 110/2

Average speed = 55 km/hr

The average speed of the car is equal to 55 km/hr

Note : average velocity = total Displacement / total time

Answer 2

Answer:

Given:

• Odometer of a car rates 1560 kilometre while starting from a point and 1670 kilometre when it returns.

Find:

• What is the average speed for journey?

Using formula:

${\star{\tiny{\sf{\underline{\boxed{\orange{\sf{Total \: distance = Final \: reading - Initial \: reading}}}}}}}}$

★ ${\sf{\underline{\boxed{\orange{\sf{Average \: speed = \dfrac{Total \: distance}{Total \: time}</h3><h3> }}}}}}$

Know terms:

1. Total distance = (D)
2. Average speed = (S)

Calculations:

⇒ $\bold{D = 1670-1560}$

⇒ ${\sf{\underline{\boxed{\red{\sf{D = 110 \: km }}}}}}$

⇒ $\bold{S= \cancel{\dfrac{110}{2}}}$

⇒ ${\sf{\underline{\boxed{\red{\sf{S = 55 \: km/hr}}}}}}$