The diagram shows a wooden rectangular cuboid with a circular hole of diameter 7 cm drilled through the centre. The dimensions of the cuboid are 40 cm by 15 cm by 12 cm. Find
(a) the volume of the solid,
(b) the total surface area of the solid.
〈Take pi = 22/7)

Let's break down the problem into parts and solve it step by step.

### Given:
- **Dimensions of the cuboid**: \( 40 \, \

Learn how to calculate the volume and total surface area of a wooden cuboid with a circular hole drilled through its center. This problem involves geometry concepts such as volume and surface area calculations, with detailed step-by-step solutions. Suitable for students in Grades 7-9.

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