Question

A cuboid has lateral surface area 152 cm square and total surface area 280 cm square find the area of its top and the cost of painting the top of the rate of rupees 18 per cm square

Answer 1

lateral surface area = 152cm^2

2( l + b) × h = 152 ---(1)

total surface area = 280

2( l + b) × h + 2lb = 280 --(2)

subtract (2) and (1) , we get

2lb = 280 - 152

2lb = 128

lb = 64 => l × b = 64

area of the top = 64cm^2

cost of painting 1cm^2 = ₹18

cost of painting the top of cuboid

= 64 × 18 = ₹1152

Answer:

cost of painting the top of the cuboid

= ₹1152

Answer 2

Answer:

rs.1152

Step-by-step explanation:

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