Question

A car travels at a speed of 30 km per hour over a certain distance. And then returns over the same distance at a. speed of 60 km per hour. What is the average speed for the total journey? (a) 35 km ph (b) 40 km ph (c) 45 km ph (d) 50 km ph​

Answer 1

Answer:

c) 45 km/h

Step-by-step explanation:

first it travels at = 30 km/h

second at = 60 km/h

average speed for total journey = (30+60)/2

                                                     = 90/2

                                                     = 45 km/h