Question

what is the speed of rocket that travels 8000 metre in 30 secs. write answer in km/hr?​

Answer 1

Answer:

If the rocket travels 8 km in 30 seconds.

16 km in 1 minute.

In 1 hour: 16×60=960

The rocket travels 960km/hr

Answer 2

Answer:

960 km/h

Explanation:

As per the provided information in the given question, we have :

• Distance travelled by the rocket (s) = 8000 m
• Time taken (t) = 30 seconds

We are asked to calculate the speed in km/h.

In order to calculate the speed in km/h, we need to distance in kilometres and time into hours.

Converting distance into km :

$\longmapsto \rm { Distance = 8000 \; m}$

• 1 m = 1/1000 km

$\longmapsto \rm { Distance = \Bigg ( 8000 \times \dfrac{1}{1000} \Bigg ) \; km}$

$\longmapsto \bf { Distance = 8 \; km}$

Converting time into seconds :

$\longmapsto \rm { Time = 30 \; s}$

• 1 s = 1/3600 h

$\longmapsto \rm { Time = \Bigg ( 30 \times \dfrac{1}{3600} \Bigg ) \; h}$

$\longmapsto \rm { Time = \Bigg ( \dfrac{3}{360} \Bigg ) \; h}$

$\longmapsto \bf { Time = \dfrac{1}{120} \; h}$

Calculating speed in km/h :

$\longmapsto \bf { Speed = \dfrac{Distance}{Time}}$

$\longmapsto \rm { Speed = \Bigg ( 8 \div \dfrac{1}{120} \Bigg ) \; kmh^{-1}}$

$\longmapsto \rm { Speed = \Bigg ( 8 \times 120 ) \; kmh^{-1}}$

$\longmapsto \bf { Speed = 960 \; kmh^{-1}}$

∴ Speed of the rocket is 960 km/h.