From a cuboid of dimension 10cm×5cm×2.5cm, small cubes of edge 2.5 cm are cut. How many small cubes are formed from the cuboid?

Correct option is B

Given
Dimensions of the cuboid = $$10 cm \times 5 cm \times 2.5 cm$$​​
Edge length of the small cubes = 2.5 cm

Formula Used
Number of cubes = $$\frac{\text{Volume of Cuboid}}{\text{Volume of one Cube}}$$​​
Volume of cuboid = $$Length \times Breadth \times Height$$​​
Volume of cube = $$Edge^3$$​​

Solution
Volume of the cuboid = $$10 \times 5 \times 2.5 = 125 cm^3$$​​
Volume of one small cube = $$2.5 \times 2.5 \times 2.5 = 15.625 cm^3$$​​
Number of cubes formed = $$\frac{125}{15.625}$$​​
Number of cubes formed = 8

Final Answer
So the correct answer is (b)