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The Paint in a Certain Container is Sufficient to Paint on Area Equal to 9.375 M2. How Many Bricks of Dimension 22.5 Cm × 10 Cm × 7.5 Cm Can Be Painted Out of this Container? - CBSE Class 9 - Mathematics

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Question

The paint in a certain container is sufficient to paint on area equal to 9.375 m2. How manybricks of dimension 22.5 cm × 10 cm × 7.5 cm can be painted out of this container?

Solution

We know that
Total surface area of one brick = 2 (lb + bh + hl )
`=2[22.5xx10+10xx7.5+22.5xx7.5]cm^2`
`=2[468.75]cm^2`
`=937.5cm^2`

Let n number of bricks be painted by the container

Area of brick= `937 .50 cm^2`

Area that can be painted in the container
`= 93755m^2= 93750cm^2`
`93750 = 93750cm^2`
`n=100`
Thus, 100 bricks can be painted out by the container.

 

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APPEARS IN

 RD Sharma Solution for Mathematics for Class 9 by R D Sharma (2018-19 Session) (2018 to Current)
Chapter 18: Surface Areas and Volume of a Cuboid and Cube
Ex.18.10 | Q: 15 | Page no. 15
Solution The Paint in a Certain Container is Sufficient to Paint on Area Equal to 9.375 M2. How Many Bricks of Dimension 22.5 Cm × 10 Cm × 7.5 Cm Can Be Painted Out of this Container? Concept: Surface Area of a Cuboid and a Cube.
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