Question

if a car travels at a speed of 25 km/ h to cross 1/3rd of a straight line.the rest of distance travels at speed of 75km/h means what is the average speed ?​

Answer 1

Answer:

Answer is 45 km/hr

Explanation:

Time = Distance / speed

Time @25 = 1/3 ÷ 25 = 1/75

Time @75 = 2/3 ÷ 75 = 2/225

Total time = 1/75 + 2/225

=5/225 = 1/45

Here, total distance is 1 and total time is 1/45

hence avg speed = 1 ÷ 1/45 = 45 kmph