On a snow day, Savannah created two snowmen in her backyard. Snowman A was built to a height of 27 inches and Snowman B was built to a height of 49 inches. The next day, the temperature increased and both snowmen began to melt. At sunrise, Snowman A's height decrease by 2 inches per hour and Snowman B's height decreased by 4 inches per hour. Let A represent the height of Snowman A t hours after sunrise and let B represent the height of Snowman B t hours after sunrise. Write an equation for each situation, in terms of t,t, and determine the interval of time, t, when Snowman A is taller than Snowman B.