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_f1 3 min 12 ft- 3 ft 3 ft theft (a) If water is being pumped into the trough at 2 cubic feet per minute, how fast is the water level rising when h is 1.4 feet deep? x ft/min (b) If the water is rising at a rate of 3/8 inch per minute when h = 2.4, determine the rate at which water is being pumped into the trough. x ft3/ min Need Help? Read It