Question

If Rishab covers a certain distance in one hour and Soham covers the same distance in two hours. Out of Rishab and Soham who is travelling at greater speed? class 9​

Answer 1

Answer:

Rishab is travelling at greater speed.

Explanation:

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

• Rishab covers a certain distance in 1 hour.
• Soham covers the same distance in 2 hours.

We are asked to find who is travelling at greater speed.

Let us suppose the certain distance covered by Rishab and Soham as x km each as distance travelled by both of them is of the same magnitude.

Speed attained by Rishab :

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

• Time taken by Rishab is 1 hour.

$\longmapsto \rm { S_1 = \dfrac{x}{1} \; kmh^{-1} }$

$\longmapsto \bf { S_1 = x\; kmh^{-1} }$

Speed attained by Soham :

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

• Time taken by Soham is 2 hours.

$\longmapsto \bf { S_2 = \dfrac{x}{2} \; kmh^{-1} }$

Comparison of their both speed :

By comparing both's speed, we get that :

$\longmapsto \rm { x > \dfrac{x}{2} }$

$\longmapsto \bf { S_1 > S_2}$

∴ Rishab has greater speed.

$\rule{200}2$

More Information :

• Speed is defined as distance travelled by the body per unit time.
• It is a scalar quantity that mean it requires only magnitude for its description.
• Its SI unit is m/s.
• It is denoted v.