Volume of cuboid

Q.

Volume of a cuboid is 240 $c{m}^3$. If its length is 8 cm and height is 5 cm, find its breadth.

1. 7 cm

2. 6 cm

3. 10 cm

4. 9 cm

Q.

A cuboidal birthday cake measures $30cm\times 20cm\times 12cm$. If one childs share is $200c{m}^3$ of cake, find the number of children who attended the birthday party.