Question

If an object moves 18 meters, in first 3 seconds,then 22 miters in nert 3 seconds, then 14 meters in nert 3 second.find average speed​

Answer 1

Given that:

An object moves,

• 18 meters in first 3 seconds.
• 22 meters in next 3 seconds.
• 14 meters in next 3 second.

To Find:

• The average speed.

We know that:

• Speed = Distance / Time

We have:

• Distance = (18 + 22 + 14) = 54 m
• Time = (3 + 3 + 3) = 9 sec

Finding the average speed:

↣ Speed = 54 / 9

↣ Speed = 6

Hence,

• The average speed is 6 m/sec.

Answer 2

Answer:

Given :-

• An object moves 18 metres, at first 3 seconds, then 22 metres in 3 seconds, then 14 metres in 3 seconds.

To Find :-

• What is the average speed.

Formula Used :-

$\clubsuit$ Average Speed Formula :

$\footnotesize\mapsto \sf\boxed{\bold{\pink{Average\: Speed =\: \dfrac{Total\: Distance}{Total\: Time}}}}$

Solution :-

First, we have to find the total distance :

Given :

• Distance (d₁) = 18 metres
• Distance (d₂) = 22 metres
• Distance (d₃) = 14 metres

Hence, the total distance will be :

$\implies \sf Total\: Distance =\: d_1 + d_2 + d_3$

$\implies \sf Total\: Distance =\: 18 + 22 + 14$

$\implies \sf Total\: Distance =\: 40 + 14$

$\implies \sf\bold{\purple{Total\: Distance =\: 54\: metres}}$

Now, we have to find the total time :

Given :

• Time (t₁) = 3 seconds
• Time (t₂) = 3 seconds
• Time (t₃) = 3 seconds

Hence, the total time will be :

$\implies \sf Total\: Time =\: t_1 + t_2 + t_3$

$\implies \sf Total\: Time =\: 3 + 3 + 3$

$\implies \sf Total\: Time =\: 6 + 3$

$\implies \sf\bold{\purple{Total\: Time =\: 9\: seconds}}$

Now, we have to find the average speed :

Given :

• Total Distance = 54 metres
• Total Time = 9 seconds

According to the question by using the formula we get,

$\longrightarrow \sf Average\: Speed =\: \dfrac{\cancel{54}}{\cancel{9}}$

$\longrightarrow \sf Average\: Speed =\: \dfrac{6}{1}$

$\longrightarrow \sf\bold{\red{Average\: Speed =\: 6\: m/s}}$

${\small{\bold{\underline{\therefore\: The\: average\: speed\: is\: 6\: m/s\: .}}}}$