a car travels 4km in 3 minutes.find the speed of car in cms-1
speed=4km/180sec=4000m/180s=400000cm/180 s
Speed=4 km
Time=3min
Speed=4 km×1000 m=4000
=4000 m×100 m=400000
Time=3 min ×60 sec=180
Divide
400000÷180=0.00045
Remember this d=s.t
Where d stands for DISTANCE NOT DISPLACEMENT
And s for SPEED NOT VELOCITY
Way to remember : think about department of science and technology or Dust.
5m/second
To find the speed of the car in centimeters per second (cm/s), we need to convert the distance traveled and time taken from kilometers and minutes to centimeters and seconds respectively.
First, let's convert the distance from kilometers to centimeters.
1 kilometer = 100,000 centimeters
So, 4 kilometers = 4 * 100,000 = 400,000 centimeters.
Now, let's convert the time from minutes to seconds.
1 minute = 60 seconds
So, 3 minutes = 3 * 60 = 180 seconds.
Now that we have the distance in centimeters (400,000 cm) and the time in seconds (180 s), we can calculate the speed of the car.
Speed = Distance / Time
Speed = 400,000 cm / 180 s
Speed = 2,222.22 cm/s (rounded to two decimal places)
Therefore, the speed of the car is approximately 2,222.22 cm/s.