Question

What is the answer i need answers now

Answer 1

Both trains will leave the station together again in B. 36 minutes.

What is the fundamental principle of multiplication?
Multiplication is the mathematical operation that is used to determine the product of 2 numbers or more numbers.

We have been given that “A” train leaves a subway station every 12 minutes. An “E” train leaves every 9 minutes.

If both trains just left the station on parallel tracks, then both leave the station together again;

We will be solving the LCM (least common multiple)
The LCM of 12 and 9
12=2x3x4x6x12
9=3x1x9

The LCM of 12 and 9 is 36

Hence, both trains will leave the station together again in B. 36 minutes.

Answer 2

If both trains just left the station on parallel tracks, then both leave the station together again;

We will solving for the LCM (Least Common
Multiple),

The LCM of 12 and 9
12=2×3×4x6 × 12
9=3x1 x 9

The LCM of 12 and 9 is 36

Hence, Both trains will leave the station together again in B. 36 minutes.