A cubical box with lid has a length of 30 cm.find the cost of paintings the inside and outside of the box at RS 5.50 per meter square
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1
Total surface area of cubical box will be (6*30)cm square.
=180cm square
Inner surface area =outer surface area
Cost of painting = 2(180)*5.50
=360*5.50
=₹1980
=180cm square
Inner surface area =outer surface area
Cost of painting = 2(180)*5.50
=360*5.50
=₹1980
Answered by
6
T.S.A. of cube = 6a² = 6 × [30/100]² = 0.54 m²
Total painted area = 0.54 × 2 = 1.08 m²
Prise of painting whole box = 5.50 × 1.08 = Rs 5.94
Total painted area = 0.54 × 2 = 1.08 m²
Prise of painting whole box = 5.50 × 1.08 = Rs 5.94
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