Question

A man covers a total distance of 800 km in his car with an average speed of
40 km/hr. How much time does he take?​

Answer 1

Explanation:

time = distance /speed

==800/40

==20 hours

Answer 2

Answer:

Here, it is said that a man cover a total distance of 800 km in his car and with an average speed of 40 km/hr. So, we have asked to find out the time he taken to cover the total distance.

For that, we will use the formula for finding the average speed. Then, we get our answer.

Let's solve it :

The average speed of a body is the total distance travelled divided by the total time taken to cover this distance.

$\bullet \: \: {\boxed{\bf {Average \: Speed = \dfrac{Total \: Distance \: Travelled}{ Total \: Time \: Taken}}}}$

We know,

$:\implies \sf Average \: Speed = \dfrac{Total \: Distance \: Travelled}{ Total \: Time \: Taken}$

From Given :

• Total Distance covered → 800 km

• Average Speed → 40 km/hr

Plugging in the respective values, we get :

$\dashrightarrow \: \: \: \sf 40 = \dfrac{800}{ Total \: Time \: Taken}$

Interchanging Time and Speed place :

$\dashrightarrow \: \: \: \sf Total \: Time \: Taken = \dfrac{800}{40}$

$\dashrightarrow \: \: \: \sf Time \: Taken = \dfrac{\cancel{800}^{\: \: \: 20} }{\not{40}}$

$\dashrightarrow \: \: \: \sf Time \: Taken = 20 \: hr$

$\boxed{\therefore \sf{Total \: Time \: Taken = {\red{20 \: hours}}}}$

Hence,

The man covers a total distance of 800 km in his car with an average speed of 40 km/hr in 20 hours.