Question

in a journey along a highway a car cruise at 30 ms-1 for one hour and takes 30 mins to travel 12 km/hr in heavy traffic conditions.what is the average speed of car for the journey







Answer me fast!!!!!!!!!!!!!!​

Answer 1

Explanation:

1st case:-

30 m/s is the speed

Time is 1 hour = 3600 seconds

We need to find Distance

\sf{Speed = \frac{Distance}{Time}}Speed=

Time

Distance

\begin{gathered}\sf{30 = \frac{Distance}{3600}}\\\sf{Distance = 30 \times 3600} \\\sf{Distance = 108000 \ meters}\end{gathered}

30=

3600

Distance

Distance=30×3600

Distance=108000 meters

Second Case;-

Time is 1800 seconds i.e 30 minutes

Distance is 12 km = 12000 Meters.

\sf{Average \ Speed = \frac{Total \ Distance}{Total \ Time}}Average Speed=

Total Time

Total Distance

\begin{gathered}\sf{=\frac{108000+12000}{3600+1800}}\\\sf{= \frac{120000}{5400}}\\\sf{= 22.22 m/s\end{gathered}

= 79.99 Km/h (Converted)

So, c part is the correct

Answer 2

Answer:

hi

Explanation:

79.99km/h bcoz of distance.