Question 5 2 pts A triangular trough is 10 ft long, 6 ft across the top, and 3 ft deep. If water flows in at the rate of 12 ft3/min, find how fast the surface is rising when the water is 6 in. deep. O 6/5 ft/min O 3/5 ft/min O 5/6 ft/min O None of the choices O 1 ft/min