Question

2- A car spends two hours driving at 20 km/h, and then an hour driving at 50 km/h.
What is the average speed of the car?
A. 50 km/h
B. 45 km/h
C. 35 km/h
D. 30 km/h
Please I need the answer of this

Answer 1

The answer is c
To find average you need to add the numbers given and divide by what the question says

For example you add 20 and 50 which gives you 70 then you divide by 2 which gives you 35 km/h

Answer 2

The average speed of the car is 35 km/hr.

To calculate the average speed, the given values of speed are:

x = 20 km / hr

y = 50 km / hr

What is average speed and how it was calculated?

  If two objects are in motion, the distance by those two objects at any  particular interval of time is said to be average speed.

The unit of average speed is m/s or km/hr.

For this particular question, the formula to find the average speed from the given speed is,

                     Average speed =  ( x + y ) / 2

                                                =  ( 20 + 50 ) / 2

                                                = 70 /2

                                                = 35 km / hr.

Thus, Average speed can be calculated as 35 km/hr.

So, the Option C is the correct answer.

Learn more about Average speed,

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