Question

Neeta travels the first 4 hours of her journey at the speed of 60kmph and the remaining 5 hours at 24 kmph. What is the average speed

Answer 1

Answer:

the answer should be 42 km/h

Answer 2

The average speed is 40 km/h .

Given :

Speed of Neeta in first 4 hours , u = 60 km/h .

Speed in remaining 5 hours , v = 24 km/h .

We know , average speed is total distance covered by total time taken .

In mathematics it is given as :

$v_{avg}=\dfrac{v\times t_1+u\times t_2}{t_1+t_2}$

Putting every value in above equation .

We get ,

$v_{avg}=\dfrac{60\times 4+24\times 5}{4+5}\\\\v_{avg}=\dfrac{240+120}{9}\\\\v_{avg}=40\ km/h\ .$

Hence , this is the required solution .

Learn More :

Kinematics

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