Question

A car travels 4 km in 3 minutes find the speed of car in cm/sec

Answer 1

Speed of car is given by

$v = \frac{distance}{time}$

given that

$distance = 4 km = 4000 m= 400000 cm$

$time = 3 min = 3 * 60 = 180 s$

now the speed is given as

$v = \frac{400000}{180}$

$v = 2222.22 cm/s$

so the speed will be 2222.22 cm/s

Answer 2

Answer: The correct answer is  2222.2 cm/s.

Explanation:

The expression for the distance- time relation is as follows;

D=st

Here, D is the distance, s is the speed and t is the time.

It is given in the problem that a car travels 4 km in 3 minutes.

1 km= 100000 cm

1 min= 60 s

Calculate the speed of car in cm/s.

Put D= 4 km and t= 3 min in the above expression.

(4 km)=s(3 min)

$s=\frac{(4)(100000 cm)}{(3 min)(60 s)}$

s= 2222.2 cm/s

Therefore, the speed of the car is  2222.2 cm/s.