A car travels 180km in 1 hr. how much it will travel in 8 seconds?
Answers
Step-by-step explanation:
Distance covered by car 180km
Time taken by car 4hrs
Speed of car
4
180
=45kmph
i) Distance travelled =400km
Time taken is
45
400
=8.8hrs
ii) time taken is 7hrs
Distance travelled is 45×7=315km
Required Answer :
The distance travelled by the car in 4 seconds = 0.4 km
Given :
• Distance travelled by a car = 180 km
• Time taken by the car = 1 hr
To find :
• The distance the car will travel in 8 seconds.
Solution :
Firstly, we will calculate the speed of the car when the distance travelled is 180 km and time is 1 hr.
Using formula,
- Speed = Distance ÷ Time
Substituting the given values :-
→ Speed = 180 ÷ 1
→ Speed = 180
Speed of the car = 180 km/hr
Now, we will calculate the distance travelled by the car when the speed of the car is 180 km/hr and time is 8 seconds.
[Note : Here, we shall change the time from 8 seconds into hours because units should be same while doing calculation for the correct answer.]
As we know,
- 1 second = 1/3600 hr
In order to convert the value of time from seconds into hours, divide it by 3600.
→ Time = 8/3600
→ Time = 4/1800
→ Time = 2/900
Time = 2/900 hr
Using formula,
- Distance = Speed × Time
Substituting the given values :-
→ Distance = 180 × 2/900
→ Distance = 18 × 2/90
→ Distance = 2/5
→ Distance = 0.4
Therefore, the distance travelled by the car in 4 seconds = 0.4 km