Akash travels with uniform speed of 20 km per hour for 2 hours and then 50 km per hour for another 3 hours what is the average speed of a car in whole journey
Answers
Answer :
- The Average speed = 38 km h¯¹
Given :
- In the first part Akash travels with uniform speed of 20 km per hour for 2 hours.
- In the second part Akash traveled 50 km per hour for another 3 hours.
To find :
- Average speed of a car in whole journey =?
Step-by-step Explanation:
In the first part Akash travels with uniform speed of 20 km per hour for 2 hours.
Given :
- Speed = 20 km/h¯¹
- Time = 2 hours
- Distance =?
We know that,
Distance = Speed × Time
Substituting the values in the above formula, we get,
= 20 × 2
= 40.
Hence, In the first part distance covered by the car = 40 km.
In the second part Akash traveled 50 km per hour for another 3 hours.
Given :
- Speed = 50 km/h¯¹
- Time = 3 hours
- Distance =?
We know that,
Distance = Speed × Time
Substituting the values in the above formula, we get,
= 50 × 3
= 150.
Hence, In the second part distance covered by the car = 150 km.
Now,
Total time = 2 + 3 = 5 hours.
Then,
Total Distance = 150 + 40 = 190 km.
We know that,
Average Speed = Total distance traveled /Total time taken.
Substituting the values in the above formula, we get,
= 190/5
=38.
Thus, The Average speed of the car in whole journey = 38 km h¯¹
ANSWER ----------›
AVERAGE SPEED OF CAR IN
AVERAGE SPEED OF CAR IN WHOLE JOURNEY = 38 Km h -¹
________________________________
EXPLANATION --------------›
GIVEN :-----
___________
★ DISTANCE AKASH TRAVELED = 20 Km/hr for 2 hrs.
★ DISTANCE AKASH TRAVELED = 50 km/hr for 3 hrs.
___________________________
TO FIND :----
__________
AVERAGE SPEED OF CAR IN THE WHOLE JOURNEY = ?
________________________________
NOW ,
(FOR 1ST PART )
GIVEN ,
=> SPEED = 20 Km / hr
=> TIME = 2 hrs
=> DISTANCE = ?
(AS WE KNOW HERE )
_________________
=> DISTANCE = SPEED × TIME
=> DISTANCE = 20 × 2
=> DISTANCE = 40 Km/hr
HENCE ,
DISTANCE COVERED IN 1ST PART = 40 Km / hr
-----------------------------------------------------------
NOW,
(FOR 2ND PART )
GIVEN,
=> SPEED = 50 Km / hr
=> TIME = 3 hrs
=> DISTANCE = ?
(AS WE KNOW HERE )
_________________
=> DISTANCE = SPEED × TIME
=> DISTANCE = 50 × 3
=> DISTANCE = 150 km/hr
DISTANCE COVERED IN 2ND PART = 150 Km/hr
====================================
NOW HERE ,
=> TOTAL TIME TAKEN = 2+3 = 5 HOURS
=> TOTAL DISTANCE COVERED = 150 KM
AVERAGE SPEED =
TOTAL DISTANCE COVERED _______________________
TOTAL TIME TAKEN
AVERAGE SPEED => 190 km
_______ = 38Km /hr
5 hr
====================================
SO, THE AVERAGE SPEED OF CAR IN THE WHOLE JOURNEY =
38 Km/hr.
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