Question

An object travels a distance of 40km with avg speed of 80km/h and then next 40km with avg speed of 40km/h. Find the avg speed with the total distance.​

Answer 1

Given :

• An object travels a distance of 40km with avg speed of 80km/h
• And then next 40km with avg speed of 40km/h.

To Find :

• Find the average speed & total distance ?

We know that :

• Distance = Speed × Time
• Time = Distance/Speed
• Speed = Distance/Time

Solution :

• Finding the time.

When,

• Distance = 40km/h
• Speed = 80km/h

➣ Time = 40/80 h

➣ Time = 0.5 h

When,

• Distance = 40 km
• Speed = 40 km/h

➣ Time = 40/40 h

➣ Time = 1 h

Now,

• Total distance = 40 + 40 = 80 km
• Total time = 0.5 + 1 = 1.5 h

Finding the average speed :

• Average speed = Total distance/Total time

➣ Average speed = 80/1.5

➣ Average speed = 53.33 (approx.)

Hence,

• The average speed of the object is 53.33 km/h.
• And the total distance is 80 km.

Answer 2

$\color{purple} {Answer}$

Given: $\rightarrow$An object covers a distance of 40km with average speed of 80km/h

$\rightarrow$ Next 40km with average speed of 40km/h

To Find: $\color{green} {Average\:speed\:with\:toatal\:distance}$

Solution:

According to question We are going to find total distance and average speed in this question

So let's begin:

$\color{red} {To\:find\:total\: distance\:covered}$

We just simply add all the distances they have give us :

$\rightarrow$ Which is 40 km in first half an hour and 40 km in next one hour

So,

$\rightarrow$ $\color{orange} {Total\: distance\: covered\:by\:an\:object\:is\:80km}$

Now , we will find average speed :

So let's begin:

$\rightarrow$ To find average speed we have formula which is

As to find speed we use

$\rightarrow$ $\frac{Distance}{time}$

$\rightarrow$ $\frac{Total Distance}{Total time}$

• So here we have total distance = 80km

• Total time = 1.5 hours

$\rightarrow$ So, Average speed will be

$\rightarrow$ $\frac{80}{1.5}$

$\color{purple} {Average\:speed\:=\:5.33\:approx}$

Final answers :

• Total Distance = 80km

• Average speed = 5.33 approx

$\color{blue} {Hope\:it\:helps\:you}$