Question

please answer these questions
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Answer 1

Answer:

Given:-

Speed of train ,s = 54km/h

Time taken to cross a signal post ,t = 10 s

To Find:-

Length of train , d

Solution:-

⠀⠀⠀⠀⠀⠀⠀⠀⠀According to the Question

we have to calculate the length of train . Firstly we convert the speed of train into m/s. So we multiply the given speed by 5/18 we get the speed into m/s.

:\implies:⟹ s = 54×5/18

:\implies:⟹ s = 3×5

:\implies:⟹ s = 15m/s

So , the speed of train is 15m/s .

Now, calculating the length of train . As we know that

d = st

where,

d denote length of train

s denote speed

t denote time taken to cross post

substitute the value we get

:\implies:⟹ d = 15×10

:\implies:⟹ d = 150m

Hence, the Length of the train is 150m.