Question

A car travels 240km at a speed of 80 km/h. It covers next 360 km at a speed of 90 km/hr. Find the average speed of the car.​

Answer 1

Answer:

240Km/hr

Explanation:

1) Speed = Distance / Time

80km/h = Distance / (90/60)hr

Distance = 80*(90/60) km

               = 120 km

So, 120 km will cover in 90 minutes.

2) Speed = Distance / Time

   80km/h = 240 km / Time

   Time = 240 km / (80 km/h)

             = 3 hr

            = (3*60) minutes

            = 180 minutes

So the average speed is 240 KM/HR

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Answer 2

Answer:

✡ Given ✡

A car travels 240 km at a speed of 80 km/h.

⇝ Its cover next 360 km at a speed of 90 km/h.

✡ To Find ✡

⇝ What is the average speed of the car.

✡ Solution ✡

⭐ Time =

$\dfrac{Distance}{Speed} </p><p>Speed</p><p>Distance$

⭐

✏ Time taken for 240 km,

$\implies⟹ \dfrac{240}{80} </p><p>80</p><p>240 \\ </p><p> </p><p> </p><p></p><p>\implies⟹ 3 hrs$

✏ Time taken for 360 km,

$\implies⟹ \dfrac{360}{90} </p><p>90</p><p>360</p><p>$

$\implies⟹ 4 hrs$

✏ Total distance travel by car,

$\implies⟹ 240 + 360 \\ </p><p></p><p>\implies⟹ 600 km</p><p>$

✏ Total time taken by car,

$\implies⟹ 3 + 4 \\ </p><p></p><p>\implies⟹ 7 hrs$

⭐ Average Speed =

$\</p><p> \\ \dfrac{Total\: distance\: travel\:}{Total\: time\: taken\:}$

Given:-

Total distance travel = 600 km

Total time taken = 7 hrs

▶ According to the question,

✏ Average speed of the car,

$\implies⟹ \dfrac{600}{7} </p><p>7</p><p>600</p><p>$

$\implies⟹ 85.71 km/h.$

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