Given: → Area = 9.375 m² → 22.5 cm × 10 cm × 7.5 cm = l × b × h → Total surface area of cuboid (brick) = 2(lb + bh + lh) → 2(22.5 × 10 + 10 × 7.5 + 22.5 × 7.5) cm² = 2 × 468.75 = 937.5 cm² → Area that can be painted by part of container = 93750 cm² (since 9.375 m² = 9.375 × 10000 cm² = 93750 cm²) → Let x number of bricks will be used. → Area = 937.5 × x cm² → x = 93750 / 937.5 → x = 100