Let l = 22.5 cm, b = 10 cm and h = 7.5 cm
Surface area of each brick
= 2(lb + bh + lh)
= 2(22.5 × 10 + 10 ×7.5 + 7.5 × 22.5 cm²
= 2 (225 + 75 + 168.75) cm²
= 2(468.75) cm² = 937.5 cm²
Area that can be painted using the paint of container = 9.375 m² = 9.375 × 100 × 100 cm²
Number of bricks that can be painted
[tex] = \frac{Total \: area \: that \: can \: be \: painted}{ Surface \: area \: of \: each \: brick } [/tex]
[tex] = \frac{9.375 \times 100 \times 100 \: cm {}^{2} }{937.5 \: cm {}^{2} } = 100[/tex]
Hence, 100 bricks can be painted out of the paint given in the container.
