Question

A car moves with
a s= 30 kr/h for 1/2 hr , 25km/h for
1 hour, 40 km/h for
2hrs Calculate the
Average
speed.​

Answer 1

Answer:

average speed=total dist/total time

=(30*0.5+25*1+40*2)/(0.5+1+2)

=3402857 km/hr

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Answer 2

Answer:

31.42Kmph

Explanation:

Average speed = Total distance traveled ÷ Total time taken

Total distance traveled

distance = speed *Time

$d = (30 \times \frac{1}{2} ) +( 25 \times 1) + (40 \times 1) \\ d = 15 + 25 + 80 \\ d = 120km$

total distance traveled= 120Km

Total Time Taken

$t = \frac{1}{2} + 1 + 2 \\ t = \frac{7}{2} = 3.5 \: hrs$

now,

Average speed = 120 Km ÷ 3.5 hrs

Average speed= 31.42 Km/H

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.MARK AS BRAINLIST