(a) 50
te 48
(b) 52.5
(d) 51.5
Q.4
Two trains are approaching each other from
opposite sides and cross each other in 14
seconds. What is the speed of second train if
speed of first train is 7 km/hr and the length of
the trains are 126 m and 240 m respectively?
(a) 67.14 kmph (b) 87.11 kmph
(c) 77.14 kmph (d) 97.11 kmph
Q.5
A bus has to cover a distance of 80 km in 10 hrs.
If it covers first half of journey in 3/5 of time,
Answers
Answer:
50 km
Step-by-step explanation:
The speed of the second train was 50km/h.
The speed of the second train was 50km/h.Length of first train=175 m
The speed of the second train was 50km/h.Length of first train=175 mLength of second train=125m
The speed of the second train was 50km/h.Length of first train=175 mLength of second train=125mTotal length for the trains to cross each other =175m+125m=300m
The speed of the second train was 50km/h.Length of first train=175 mLength of second train=125mTotal length for the trains to cross each other =175m+125m=300mTime to do so=12sec.
The speed of the second train was 50km/h.Length of first train=175 mLength of second train=125mTotal length for the trains to cross each other =175m+125m=300mTime to do so=12sec.Now net speed= 300/12=25m/s= 25*18/5km/hr=90km/hr
The speed of the second train was 50km/h.Length of first train=175 mLength of second train=125mTotal length for the trains to cross each other =175m+125m=300mTime to do so=12sec.Now net speed= 300/12=25m/s= 25*18/5km/hr=90km/hrSpeed of first train =40km/hr
The speed of the second train was 50km/h.Length of first train=175 mLength of second train=125mTotal length for the trains to cross each other =175m+125m=300mTime to do so=12sec.Now net speed= 300/12=25m/s= 25*18/5km/hr=90km/hrSpeed of first train =40km/hrHence, speed of second train=90-40=50km/hr.