When a bicycle rides in a straight line at 1 km at 10 km/h and then another 1 km at 25 km/h then the average speed of the bicycle is 14.28 km /h
What is speed?
The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object. The unit of speed is meter/second. The generally considered unit for speed is a meter per second.
The mathematical expression for speed is given by
average speed = total distance /Total time
As given in the problem a bicycle rides in a straight line at 1 km at 10 km/h and then another 1 km at 25 km/h
The total distance covered by the bicycle is
S =1 km +1 km
=2 km
The time is taken by bicycle on the first ride
T₁ = 1 km / 10 km/h
T₁ = 1/10 h
The time is taken by bicycle on the second ride
T₂ = 1 km /25 km/h
T₂= 1/25 h
Then by using the formula for the average speed
Average speed = total distance /Total time
By substituting the respective values of the total distance and total time
average speed = 2 / ( 1/10 + 1/25)
=14.28 km /h
Thus, the average speed of the bicycle comes out to be 14.28 km /h
Learn more about speed from here
brainly.com/question/7359669
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