A train, travelling at a uniform speed for 360 km, would have taken 48 minutes less to travel the same distance if its speed were 5 km/hr more. Find the original speed of the train.
Solve and explain!!
Answers
Answered by
1
Answer:
Correct option is
A
45
Let x= Original Speed
we know that
speed
distance
=time
So as per the question the following equation can be formed
x
360
−
x+5
360
=
60
48
[1 hour = 60 minutes]
⇒
x
1
−
x+5
1
=
60
48
⋅
360
1
⇒
x
2
+5x
5
=
450
1
⇒x
2
+5x−2250=0
⇒x
2
−45x+50x−2250=0
⇒x(x−45)+50(x−45)=0
⇒(x−45)(x+50)=0
x=45,−50
As the speed can't be negative so,
x=45
Answered by
5
Answer:
Explanation:
- Refer these attachment
Attachments:
Similar questions