Question

The speed of a car is 40kmph .what distance cover
in 9 seconds ?​

Answer 1

Answer: 100 m

Step-by-step explanation:

Speed , v = 40 kmph

= 40 × (5/18) m/s

= 100/9 m/s

Time, t = 9 sec

Speed = distance/time

Distance covered = speed × time

= (100/9) × 9

= 100 m

= 0.1 km

Answer 2

Answer:

The distance traveled by the car in 1 second  =  $\frac{100}{9}$m

Step-by-step explanation:

Given,

The speed of the car = 40km/h

To find,

The distance covered by the car in 9 seconds

Recall the concepts

Speed = distance covered in unit time

1 hour = 3600 seconds

1km = 1000m

Solution:

The speed of the car is 40km/h we have,

The distance traveled by the car in 1 hour = 40km

Since 1 hour is 3600 seconds,

The distance traveled by the car in 3600 seconds = 40km

The distance traveled by the car in 1 second = $\frac{40}{3600}$ km

= $\frac{1}{90}$ km

Since 1km = 1000m,

= $\frac{1}{90}$ × 1000

= $\frac{100}{9}$m

∴ The distance traveled by the car in 1 second  =  $\frac{100}{9}$m

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