the paint in a certain container is sufficient to paint an area equal to 9.375 metre square. how many bricks of dimensions 22.5cm*10cm*7.5cm can be painted out of this container?
Answers
Answer:
The number of bricks that can be painted = 100
Step-by-step explanation:
A brick will have six surfaces with the following areas:
22.5 cm x 10 cm = 225 cm² ...(two surfaces)
22.5 cm x 7.5 cm = 168.75 cm² ...(two surfaces)
10 cm x 7.5 cm = 75 cm² (two surfaces)
Total surface area of 1 brick
= 2(225 + 168.75 + 75) cm²
= 2(468.75) cm²
= 937.5 cm²
Given: The container of paint can be used to paint an area of 9.375 m²
1 m = 100 cm
1 m² = 100 cm x 100 cm
1 m² = 10000 cm²
The area that can be painted = 9.375 x 10000 cm²
= 93750 cm²
No. of bricks that can be painted =
Total paintable area ÷ Surface area of 1 brick
=> No. of bricks that can be painted = 93750 / 937.5
= 100
The number of bricks that can be painted = 100