Question

the paint in a container is sufficient to paint an area of 9.375m^2 how many bricks measuring 22.5by10by7.5cm can be painted from its cylinder

Answer 1

surfase area of each break is as follows
$2 (22.5 \times 10 + 7.5 \times 10 + 22.5 \times 7.) \\ = 2 \times 468.5 \\ = 937$
now devide it by the area that can be painted
$\frac{93750}{937}$
so ans would be approximately
100