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Time Distance and Speed
Q. A train which is 150m. long passes a platform of 200 m in 15 sec. What is the speed of the train?
A) 36 km/hr
B) 64 km/hr
C) 84 km/hr
D) 91 km/hr
Read Solution (Total 7)
-
- total distance cover by train in 15sec=150+200m
speed=distance/time
speed=350/15(m/s)
speed in km/hr=350/15*18/5=84km/hr
- 9 years agoHelpfull: Yes(7) No(0)
- C) 84 km/hr
Total distance crossed=150+200=350 m. or 0.35 km. and time taken(in hr.)=15/3600
So speed= 0.35/(15/3600)=84 km/hr - 9 years agoHelpfull: Yes(2) No(0)
- 200+150 m distance covered in 15 secs ,then applying simple unitary method get the speed
answer will be 84km/hr option c - 9 years agoHelpfull: Yes(2) No(0)
- 84km/hr
answer in m/sec=23.3
convert m/sec into km/hr =23.3*18/5=84km/hr - 7 years agoHelpfull: Yes(2) No(0)
- 150+200=350
350/15=70/3m/s
=84km/hr - 6 years agoHelpfull: Yes(1) No(0)
- (150m+200m)/15s=350/15
=70/3 m/s.=(70*18)/3*5=84km/hr
84km/h - 4 years agoHelpfull: Yes(1) No(0)
- To calculate the speed of the train, we first need to determine the total distance it covers while passing the platform.
### Step 1: Calculate total distance
The train covers the length of both the train and the platform:
[
text{Total Distance} = text{Length of Train} + text{Length of Platform}
]
[
text{Total Distance} = 150 , text{m} + 200 , text{m} = 350 , text{m}
]
### Step 2: Calculate speed in meters per second
The time taken to cover this distance is 15 seconds. The speed of the train is:
[
text{Speed} = frac{text{Total Distance}}{text{Time}} = frac{350 , text{m}}{15 , text{sec}} = 23.33 , text{m/s}
]
### Step 3: Convert speed to km/h
To convert meters per second to kilometers per hour, multiply by 3.6:
[
text{Speed in km/h} = 23.33 times 3.6 = 84 , text{km/h}
]
### Final Answer:
The speed of the train is **84 km/h**, so the correct option is:
**C) 84 km/h**. - 2 Months agoHelpfull: Yes(0) No(0)
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