Question

a car travels 400 metre in 40 seconds what is the speed of the car​

Answer 1

$\huge\bold\red{Hey!}$

Distance= 400 m

Time = 40 seconds

Speed = Distance/Time

= 400/40

= 10 m/s

Answer 2

The speed of the car is 10 m/s or 36 km/h

Given : A car travels 400 meters in 40 seconds.

To find : The speed of the car.

Solution :

We can simply solve this mathematical problem by using the following mathematical process. (our goal is to calculate the speed of the car)

Here, we will be using the general arithmetic method.

The car travels in 40 seconds = 400 meters

The car travels in 1 second = 400/40 = 10 meters

So, the speed of the car = 10 m/s

Now, calculate the speed in km/h unit. (km/h is a more used unit for measuring the speed of a car)

Now,

The car travels in 1 second = 10 meters

The car travels in 3600 seconds = (3600 × 10) = 36000 meters

The car travels in 1 hour = (36000 ÷ 1000) = 36 km

[As, 1 hour = 3600 second; 1 km = 1000 meters]

So, the speed of the car = 36 km/h

Hence, the speed of the car is 10 m/s or 36 km/h