Question

bridge. 16. A train passes two bridge of lengths 210m and 122m in 25 sec and 17 sec respectively. Let us calculate the lenth and speed of the train. moining at a speed of 48 km/hr passes a tunnel in 21 sen​

Answer 1

Answer:

let length of the train be L and speed S

(210+L)/S=25 1st equation

(122+L)/S=17 2nd equation

210+L=25S 3rd equation

122+L=17S 4th equation

Subtract 4th equation from 3rd equation

88=8S

S=88/8=11

Put this value of S in any of the above equations

you will get the value of L

122+L=17×11=187

L=187-122=65

Answer 2

Answer:

This is your answer hope it's help u