The green paint bottle covers an area of $600 c m^{2}$ . Will one green paint bottle be sufficient to paint the cuboid blocks given below?

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Solution

We have to find the surface area of the two cuboids.
The surface area of 1st cuboid
$= 2 (l b + b h + h l)$
$= 2 \times (15 \times 10 + 15 \times 2 + 10 \times 2)$
$= 400 c m^{2}$
The surface area of 2nd cuboid
$= 2 (l b + b h + h l)$
$= 2 \times (10 \times 25 + 10 \times 2 + 25 \times 2)$
$= 640 c m^{2}$
Sum of two surface areas = $640 c m^{2} + 400 c m^{2} = 1040 c m^{2}$
So, the calculated area will be $1040 c m^{2}$ .
It is more than $600 c m^{2}$ , so Alex need one more green bottle to paint the cuboid blocks.

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The green paint bottle covers an area of 600 cm2. Will one green paint bottle be sufficient to paint the cuboid blocks given below?

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