Prameela painted the outer surface of a cabinet of measures 1m×2m×1.5m.Find the surface area she cover if she painted all except tge bottom of the cabinet.
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Total surface area of the cuboid = 2(LB + BH + HL)
= 2(1*2 + 2*1.5 + 1.5*1)
= 2(2 + 3 + 1.5)
= 2*6.5
Total surface area = 13 sq m
Now, the bottom of the cabinet is not to be painted, so area of the bottom must be deducted from the total surface area.
Area of the bottom part of the cabinet = 1*2
= 2 sq m
Surface area of the cabinet covered by paint except the bottom part = 13 - 2
= 11 sq m
= 2(1*2 + 2*1.5 + 1.5*1)
= 2(2 + 3 + 1.5)
= 2*6.5
Total surface area = 13 sq m
Now, the bottom of the cabinet is not to be painted, so area of the bottom must be deducted from the total surface area.
Area of the bottom part of the cabinet = 1*2
= 2 sq m
Surface area of the cabinet covered by paint except the bottom part = 13 - 2
= 11 sq m
Divzz:
wrong
surface area she painted = 11m^2
expain = TSA of cabinet - area of bottom
= 2 (lb + bh + lh) - lb
= 2 (1×2+2×1.5+1×1.5) - 1×2
= 2 (2+3+1.5) - 2
= 2 × 6.5 - 2
= 13 - 2 = 11m^2
= 2 (lb + bh + lh) - lb
= 2 (1×2+2×1.5+1×1.5) - 1×2
= 2 (2+3+1.5) - 2
= 2 × 6.5 - 2
= 13 - 2 = 11m^2
yaa ,, it's correct ! tq
thnxxx
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