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Surface area = 392 in²

Step-by-step explanation:

It is divided into different sections as shown in the attached photo to aid explanation.

Looking at the attached photo

Area of A = 6 × 6 = 36 in²

Area of B = 4 × 10 = 40 in²

Area of the face containing A and B = 36 + 40 = 76 in²

Since the face is the same on the opposite end,

Area of the opposite end of AB = 76 in²

Area o C = 6 × 4 = 24 in²

Area of D = 6 × 6 = 36 in²

Area of E = 6 × 6 = 36 in²

Area of F = 6 × 4 = 24 in²

Area of base G = 10 × 6 = 60 in²

Area of back H = 6 × 10 = 60 in²

The surface area is the sum of all the faces of the given solid.

Therefore,

Surface area = 76 + 76 + 24 + 36 + 36 + 24 + 60 + 60 = 392 square inches

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step-by-step explanation:

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94

step-by-step explanation:

average the numbers and use a variable to figure out the minimum to get a 90.

(79+94+91+92+x)/5=90

x = 94