Answer:
The answer is C
Step-by-step explanation:
cedar is 68 square root is 8.2
Pine is 7.92
walnut is 63/8=7.89
oak is 7.3
B = 2h
Area = 121
1/2 × b × h = 121
1/2 × 2h × h = 121
h × h = 121
h^2 = 121
h = square root of 121
h = 11
The height is 11 kilometers
