Question

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Please answer the question fast and correctly.
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Answer 1

Take x axis for showing time, and y axis for showing distance travelled.

Here, for x axis, the scale is 1 unit = 10 minutes

For y axis, the scale is 1 unit = 2 km

Now, plot the graph. You will obtain a straifght line graph which shows that the velocity is uniform.

Now, the velocity can be calculated as, in 10 minutes it goes 2.5 km

So, velocity = distance/time

velocity = 2.5/10 km/min

= 2500/600 m/s (Since, 2.5 km = 2500 m and 10 min = 600 s)

= 25/6 m/s

Now, to convert to km/hr, multiply with 18/5

25/6 × 18/5

= 15 km/hr.

Answer 2

$\mathfrak{\huge{Hi !}}$

$\tt{\underline{Speed}}$

When you will start finding out the speed, you will get a uniform speed of $\tt{15 km/hr\:and \:4.17 m/s}$

Method to find the speed in km/hr :-

$\tt{\frac{Distance}{Time} = \frac{2.5}{10}}$

But as you are finding the speed in km/hr and not in km/min, you need to convert the time given in minutes, into hours. This can be done as :

$\tt{\frac{2.5 \times 60}{10} = 15 km/hr}$

Similarly, you can find the speed for all the given conditions in km/hr.

Method to find the speed in m/s :-

$\tt{\frac{Distance}{Time} = \frac{2.5}{10}}$

But as you are finding the speed in m/s and not in km/min, you need to convert the time given in minutes, into seconds; as well as the distance given in kilometres, into metres. This can be done as :

$\tt{\frac{2.5 \times 1000}{10 \times 60} = 4.17 m/s}$

Similarly, you can find the speed for all the given conditions in m/s.

The graph will be as attached with the answer.