Question

A car takes 40 min to cover a distance of 30km .calculate it's speed in km/hr

Answer 1

Answer:

40 Min = 2/3 hours

there fore ,

speed = distance upon time

2×30/3

= 20km/hr

Answer 2

Answer:

• If a car takes 40 minutes to cover a distance of 30 km, its speed is 45 km/h.

Step-by-step explanation:

Given that:

• A car takes 40 minutes to cover a distance of 30 km.

To Find:

• Speed of the car in km/h.

Solution:

To find the speed in km/h, we first have to convert the time from minutes to hour.

Converting time from minutes to hour:

• Time = 40 minutes

As we know that,

• A hour has 60 minutes.

Therefore,

$\sf{40\;mins=\dfrac{40}{60}\;hours=\dfrac{2}{3}\;hours}$

---------------------------

Now,

As we know that:

$\sf{\circ \;\;Speed=\dfrac{Distance \;covered}{Time\; taken}}$

Substituting the values,

$\sf{Speed=\dfrac{30}{\dfrac{2}{3}}}$

$\sf{\longmapsto\dfrac{30\times3}{2}}$

Reducing the numbers,

$\sf{\longmapsto\dfrac{15\times3}{1}}$

$\sf{\longmapsto15\times3}$

Multiplying the numbers,

$\sf{\longmapsto45}$

Hence, speed of the car is 45 km/h.