Question

A car travels at a speed of 20m/s and reaches its destination in 4 hr. How far does it travel? Give the answer in Km

Answer 1

Answer:

288 km

Explanation:

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

• Speed of the car, v = 20 m/s
• Time taken, t = 4 hr

We are asked to calculate the distance travelled in km. Let us first find the distance in metres, and then we'll convert it into km.

To find the distance in m first, we need to convert hours into seconds.

↠t = 4 hr

↠t = (4 × 60) min

↠t = 240 min $\;$

↠t = (240 × 60) s

↠t = 14400 s

Henceforth, time taken is 14,400s.

Distance is the product of speed and time. It is a scalar quantity. Its SI unit is metre. Distance travelled can never be negative or 0. Let us say that the distance travelled is S. Mathematically,

↠S = v × t

↠S = (14400 × 20) m

↠S = 288000 m

Therefore, distance travelled in metres is 288000 m. We need to convert metres into kilometres.

As it is known to us that,

↠1 km = 1000 m

↠1 m = ¹/₁₀₀₀ km

Similarly,

↠S = 288000 m

↠S = {288000 × ¹/₁₀₀₀} km

↠S = 288 km

∴ The distance travelled is 288 km.