Question

The length and breadth and thickness of rectangular sheet of wood are 3.230m 1.49m and 1.99m respectively determine the surface and volume of the sheet up to correct significant figures

Answer 1

The volume is given as follows:

$$V = 3.230m\cdot 1.49m\cdot 1.99m\approx 9.58m^3$$

The surface consists of pairs of three following parts:

$$A_1 = 3.230m\cdot 1.49m\\ A_2 = 1.99m\cdot 1.49m\\ A_3 = 3.230m\cdot 1.99m$$

Finally:

$$A = 2(A_1 + A_2 + A_3)\\ A = 2\cdot (3.230m\cdot 1.49m + 1.99m\cdot 1.49m + 3.230m\cdot 1.99m) \approx 14.21m^2$$

Answer. Volume: 9.58m^3, Surface: 14.21m^2.