Math, asked by shammiking27, 11 months ago

A नामक रेलगाड़ी एक खम्बे को 40 सैकण्ड में पार कर लेती है। अन्य B नामक रेलगाड़ी उस खम्बे
को 50 सैकण्ड में पार करती है। A रेलगाड़ी की लम्बाई, B रेलगाड़ी की लम्बाई की एक तिहाई (1/3)
है। A रेलगाड़ी की गति का B रेलगाड़ी की गति से क्या अनुपात (ratio) है?
(A) 5:12
(B) 5:3
(C) 7:4
-10
(P) 13:7
१-50​

Answers

Answered by Govindthapak
1

Answer:

A

Step-by-step explanation:

the answer is 5/12 and i have already solved it

Answered by ranikumari4878
3

Answer:

(A) 5:12

Step-by-step explanation:

Let's consider length of train A = x

then according to question length of train B = 3x

Since, train A takes 40 seconds to cross the pole, hence, the speed of train A

=\ \dfrac{length\ of\ train\ A}{time\ taken}\\\\\ =\ \dfrac{x}{40}

and since, train B takes 50 seconds to cross the pole hence the speed of train B

\ =\ \dfrac{length\ of\ train\ B}{time\ taken}\\\\\ =\ \dfrac{3x}{50}

So, the ratio of speed of train A and B is given by

\ \dfrac{\dfrac{x}{40}}{\dfrac{3x}{50}}\\\\\ =\ 5:12

So, the ratio of speed of train A and B will be 5:12.

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