A cylindrical con

Amount of water left in the container to be filled = 24 – 18 = 6 inches

Now according to question faucet drips at the rate of 2 inches per hour.

So Faucet takes 1 hour for 2 inches

For 6 inches it will take = 3 hours

Therefore, time to fill the container = 3 hours.

Now it is given that this time follows an equation given by,

18 + ?t = 24

?t = 6

We know that t = 3, putting in above equation we get,

? 3 = 6

? = 2

So in place of question mark, coefficient of t will be 2.