The paint in a certain container is sufficient to paint an area equal to 85m square . How many bricks of dimension 20cm × 10cm × 7

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1. Step-by-step explanation:

   Volume of paint = 9.375 m2 = 93750 cm2

   Dimension of brick = 22.5 cm×10 cm×7.5 cm

   Total surface area of a brick = 2(lb + bh + lh) cm2

   = 2(22.5×10 + 10×7.5 + 22.5×7.5) cm2

   = 2(225 + 75 + 168.75) cm2

   = 2×468.75 cm2 = 937.5 cm2

   Number of bricks can be painted = 93750/937.5 = 100

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