One side of a cubic box is 0.8 m. How will it cost to paint the outer surface of the box at rate of 150 Rs per square meter.

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Solution

Surface Area $= 6 a^{2}$
$= 6 \times (0.8)^{2} m^{2}$
Cost $= 150 \times 6 \times 0.8 \times 0.8$
$= 576$ Rs.

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One side of a cubic box is 0.8 m. How will it cost to paint the outer surface of the box at rate of 150 Rs per square meter.

Surface Area =6a2=6×(0.8)2m2Cost =150×6×0.8×0.8=576Rs.

Surface Area $= 6 a^{2}$
$= 6 \times (0.8)^{2} m^{2}$
Cost $= 150 \times 6 \times 0.8 \times 0.8$
$= 576$ Rs.