The area of the newly exposed two-dimensional cross-section will be 141 inches².
It should be noted that when the cubic block is cut into two parts through the diagonal, Thai will create two congruent prisms.
The newly exposed cross section is a rectangle. The length of the rectangle will be 10✓2 in. The breadth will be 10 in.
The area of the new cross section will be:
= 10 × 10✓2
= 141 inches²
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