A bus travels at a certain average speed for a distance of 75 km and then travels a distance of 90
.km at an average speed of 10 km/h mmore than the first speed. If it takes 3 hours to complete
the total journey, find its first speed.
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1
Answer:
A bus travels at a certain average speed for a distance of 75 km and then travels a distance of 90
.km at an average speed of 10 km/h mmore than the first speed. If it takes 3 hours to complete
the total journey, find its first speed.
Answered by
0
Answer:
The first speed of the bus is 50 km/h
Step-by-step explanation:
Time taken=Distance travelled/Speed
Given,total time taken=3 hours
Let the initial speed of bus be 'x'.
and the final speed of bus will be x+10.
As the bus moved with two different speeds,
t=(75/x)+(90/x+10)
the final quadratic equation we will be getting is
x²-45x-250=0;
by finding its roots we get
x=50..
The Formula for finding the roots is (-b±√b²-4ac)/2a.
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