Question

Two cars A and B race each other. The Car A ran for 2 minute at a speed of 7.5 km/h, slept for 56 minute and again ran for 2 minute at a speed of 7.5 km/h. find the average speed of the car A in the race.


meko jadu ny laga meko laga mein Janti hun Apko .

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Answer 1

Answer: the average speed of the car A in the race is 0.5 km/hr.

Step-by-step explanation:

  Average speed = $\frac{Total distance }{Total time}$

  Total time = 2+56+2 = 60 minute = 1hr

Distance 1 = Speed X Time = 7.5 X $\frac{2}{60}$ = 0.25 km

Distance 2 = 0 X $\frac{56}{60}$ = 0 km

Distance 3 = 7.5 X $\frac{2}{60}$ = 0.25 km

Therefore, Average speed = $\frac{0.50}{1hr}$ = 0.5 km/hr

Answer 2

Answer:

We know that

Distance=speed×timeDistance=speed×time

Distance travelled in first 2 minute = 7.5×2607.5×260 = 0.25 km

Distance travelled in last 2 minute = 7.5×2607.5×260= 0.25 km

Total distance = .25+.25 = 0.5 km

Total time = 2+2+56 = 60 minute = 1 hr

Average speed = 0.5/1

= 0.5 km/hr