Answer Happy

Question 12 -2 ft2 9 ft A trough is 9 feet long, and its cross section is in the shape of an isosceles right triangle with hypotenuse 2 feet, as shown above. Water begins flowing into the empty trough at the rate of 2 cubic feet per minute. At what rate is the height h feet of the water in the trough changing 2 minutes after the water begins to flow? A Decreasing at foot per minute B Increasing at ſ foot per minute с Decreasing at foot per minute D Increasing at a foot per minute