Question

(C) 20
एएUllus
A train passes a platform 110 m long in 40
seconds and a boy standing on the platform in
30 seconds. The length of the train is ?
एक रेल 110 मीटर लम्बे प्लेटफार्म को 40 सेकेण्ड तथा
प्लेटफार्म पर खड़े लड़के को 30 सेकेण्ड में पार कर लेती है।
रेलगाड़ी की लम्बाई बतायें ?
(a) 100 metres (b) 110 metres
(c) 220 metres
(d) 330 metres​

Answer 1

Answer:

hey this is ur answer

Step-by-step explanation:

speed=45×5m/sec=25m/sec.18 2

time=30 sec

let the length of bridge be x

then,130+x=25 30 2 2(130+x)=750x

=245m

Answer 2

As we know that : Time = Distance/speed

Let, the length of the train be L and speed = V

Then, according to the question :

(L+110)/V = 40 ... (1)

L/V = 30 ....(2)

=> L/V + 110/V = 40

=> 30 + 110/V = 40

=> 30V + 110 = 40V

=> 10V = 110

=> V = 11 m/s

On putting the value of V in equation (2)

=> L = 30V

=> L = 30×11

=> L = 330 m

So, the Length of the train will be 330 m

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