A 210 m long train takes 6 s to cross a man running at 9 km/h in a direction opposite to that of the train. What is the speed of the train? (in km/h)

Quantity$1$: Train A is running at a speed of $25 \mathrm{m}/\sec$ crosses. Train B is coming from opposite direction running at a speed of $15 \mathrm{m}/\sec$ in $12$ seconds. Length of Train A is twice of Train B. Find the length of train A.

Quantity $2$: $160$ Meters.

In the following questions two values are coded as $\mathrm{X}$ and $\mathrm{Y}$. Find the values of $\mathrm{X}$ and $\mathrm{Y}$ then answer as

First train crosses a $150 \mathrm{m}$ long platform in $25 \sec$ and second train crosses a person standing on same platform in $20 \sec$. If speed of both trains are $60 \mathrm{km}/\mathrm{h}$ and $45 \mathrm{km}/\mathrm{h}$ respectively then

$\mathrm{X}=$ Length of the first train.

$\mathrm{Y}=$ Length of the second train.

In the following question, two values are coded as $\mathrm{X}$ and $\mathrm{Y}$. Find the values of $\mathrm{X}$ and $\mathrm{Y}$ then answer as:

The respective ratio of lengths of two trains is $4:5$. First train crosses a person standing on the platform in $20$ seconds and the second train crosses a telegraph pole in $30$ seconds then

$\mathrm{X}=$ Speed of the first train
$\mathrm{Y}=$ Speed of the second train