A trough is 12 feet long and 3 feet across the top (see figure). Its ends are isosceles triangles with altitudes of 3 feet. 2.12. min 3.0 12- 31 Q (a) If water is being pumped into the trough at 2 cubic feet per minute, how fast (in ft/min) is the water level rising when his 1.2 feet deep? ft/min (b) If the water is rising at a rate of 3/8 inch per minute when h=2.5, determine the rate (in ft/min) at which water is being pumped into the trough.