Question

a train crosses two bridges of length 210 m and 122 m in 25 seconds and 17 seconds respectively, find the length and speed of the train​

Answer 1

Answer:

speed=8.4 m/s..still insufficient data for length of train

Step-by-step explanation:

hope this would helpful... choose this answer as BRAINLIEST

Answer 2

$\blue{To \: cross \: the \: bridge \: train \: engine \: has \: to \: travel \: distance = length \: of \: the \: bridge +its \: own \: length.} \\ \blue{ Let’s \: say \: train \: length \: is \: L \: so \: speed \: is} \\ \gray{ \frac{(210 +L) }{25} or \frac{(122 +L) }{17}} \\ \gray{==> \frac{(210 + L)}{25} = \frac{(122 +L) }{17}} \\ \gray{==> 17 \times (210 + L) = 25 \times (122 + L)} \\ \gray{ ==>8 L = 17 \times 210 - 25 \times 122} \\ \gray{L =65} \\ \pink{ Speed = \frac{(210 + 65)}{25} = 11 \frac{m}{s} }$