Final answer:
To solve for the unknown variable h in the formula for the area of a trapezoid, substitute the given values and solve the equation.
Step-by-step explanation:
To solve for the unknown variable, we can substitute the given values into the formula for the area of a trapezoid: A = (1/2)h(B + b).
Substituting A = 282, B = 20, and b = 27, we get:
282 = (1/2)h(20 + 27)
Now we can simplify the equation:
282 = (1/2)h(47)
Multiplying both sides by 2:
564 = 47h
Finally, dividing both sides by 47:
h = 564/47
Therefore, the value of h is approximately 12.