Question

A cuboid has lateral surface area 152c square and toatl s a 280cm square . find the area of its top and cost of painting the top at the rate 18 rs per cm square

Answer 1

CSA=152cm^2
TSA=280cm^2
TSA-CSA= 4 sides
280-152=128cm^2
128/2 for the top
=64 cm^2
per cm^2= rs18
64*18= 64 cm^2
1152rs
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Answer 2

❤HERE IS YOUR SOLUTION ❤-

In a cuboid -
Ľ. S. A = 152 cm sq. (given)
T. S. A=280 cm sq. (given)
Now
Area of top and bottom = Area of 4 walls and base +bottom (TSA) -Area of 4 walls (LSA)
=(280-152)cm sq.
=128cm sq.
Now -
Area of top =( 128/2) cm sq.
=64 cm sq.
Therefore area of top =64 cm sq.
cast of painting for 1 cm sq area =18 rupees
cost of painting for 64 cm sq area =64 ✖18
= 1152 rup.

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