Question

a car travels along a straight line with speed 40 km per hour from a to b and returns back from B to a with speed 60 km per hour find the average speed of the car ??


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Answer 1

Answer:

$\large\underline\mathrm\pink{Given:-}$

• s¹ = 40km/h
• s² = 60km/h
• displacement = 0

$\large\underline\mathrm\purple{to \: find \::-}$

• average speed
• average velocity of car

$\large\underline\mathrm\red{solution:-}$

• here distance is same
• let s be the distance

average speed :-

$\hookrightarrow \sf average \: speed = \frac{2s_{1} + s_{2} }{s_{1} + s_{2}}$

$\hookrightarrow \sf \frac{2 \times 40 \times 60}{40 \times 60} kmhr$

$\hookrightarrow \sf \cancel \frac{2 \times 40 \times 60}{100} kmhr$

$\hookrightarrow \sf 48kmhr$

so therefore the average speed is 48km/hr

average velocity :-

$\hookrightarrow \sf average \: velocity \: = \frac{displacement}{time}$

$\hookrightarrow \sf \frac{0}{t}$

$\hookrightarrow \sf 0kmhr$

so therefore the average velocity is 0km/hr

Answer 2

Answer:

hope it helps you

mark above one as Brainlist answer pls