An open wooden box 12dm long, 8dm wide and 5dm high in external dimensions is to be painted on the outer surface to improve its quality. If 500 mL paint can cover 300 sq.dm surface, and you only have such paint at the moment will it be enough to paint this box?
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Given : An open wooden box 12dm long, 8dm wide and 5dm high
To be painted externally
500 mL paint can cover 300 sq.dm surface
To Find : is 500 mL paint Sufficient
Solution:
open wooden box 12dm long, 8dm wide and 5dm high
Open from Top
Total External Surface area = 12 x 8 + 2 ( 12 + 8) * 5
= 96 + 200
= 296 sq.dm
500 mL paint can cover 300 sq.dm surface,
300 > 296
Hence 500 mL paint is sufficient enough to paint the box.
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