Question

A boy moves with a speed of 6 km/hr for 2 hours and with a speed of 4 km/hr for the next 3hrs. Find the average speed of the boy and the total distance travelled by him.

Answer 1

avg.speed=total distance÷total time
=(6*2+4*3)÷2+3
=24÷5=4.8km/h
total distance=24

Answer 2

Heya ! 


Your answer ↓ 

 Given :

1) Speed = 6 km/hr     Time = 2 hrs 

2) Speed = 4 km/hr     Time = 3 hrs


Find :

1) Average speed 

2) Total distance covered 


Solution:


Speed = 6 km/hr     Time = 2 hrs  

= 6 km × 2 hrs = 12 km

∴ In 2 hours 12 km can be covered 

≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈


Speed = 4 km/hr     Time = 3 hrs


= 4 km × 3 hrs = 12 km 


∴ In 3 hours 12 km can be covered 


1) Average speed = Total Distance
                                ____________

                                 Total time 


=   12 +12 
    _______    = 24/5  (Will Divide) = 4.8 km/hr
  
      2 + 4


∴ The average speed = 4.8 km/hr 



2) Total distance = 12 +12 = 24 km


∴ The boy traveled 24 km 


 
⊕ Steps 

⇒ First find how much distance did he covered in each part of the problem

⇒ Then divide the total distance from the total taken to find the average 

⇒ Then add the distances to find the distance covered in all



 Hope this helps you a lot ☺️☺️☺️