Question

a car in uniform motion travels 500 in 20s. what is its speed? how far does this car travel in 1 second and 5second? how long does it take to cover 90 m?

Answer 1

Speed = distance traveled/ time taken

= 500 m / 20 sec = 25 m/s

Thus the car travels 25 meters in one second.

In 5 seconds the car will travel a distance of 5 × 25 = 125 meters.

Time needed to travel 90 meters will be

= distance / speed

= 90 / 25 sec

= 3.60 sec

Answer 2

we have,

car travelled 500 m in 20 seconds

thus,speed = $\frac{distance}{time} = \frac{500}{20} = 25m {s}^{ - 1}$

Now, distance travelled in 1 second = 25 × 1 = 25 m.

distance travelled in 5 second = 25 × 5 = 135 m.

Time taken to cover 90 m = 90/25 = 3.6 seconds.

Basics formulas used here are :-

$speed = \frac{distnce}{time } \\ distance = speed \times time \\ time = \frac{distance}{speed}$

Regards

KSHITIJ