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A car travels 40 km at an average speed of 80 km/h and then travels 40 km at an average speed of 40 km/h. The average speed of the car for this 80 km trip is |
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(a) |
40 km/h |
(b) |
45 km/h |
(c) |
48 km/h |
(d) |
53 km/h |
|
A car travels 40 km at an average speed of 80 km/h and then travels 40 km at an average speed of 40 km/h. The average speed of the car for this 80 km trip is |
|||||||
|
(a) |
40 km/h |
(b) |
45 km/h |
(c) |
48 km/h |
(d) |
53 km/h |