Question

a cubical box with lid has a length 45 cm find the cost of painting inside and outside of the box at rs 150 metre square​

Answer 1

Answer:

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Step-by-step explanation:\

Side of cubical box=45cm=0.45m

Area to be painted=2x6(side)^2

=2x6x0.45x0.45

=2.43sq.m.

Cost of painting inside and outside of cubical box=2.43*150=₹ 364.5

Answer 2

Answer:

₹364.5

Step-by-step explanation:

First find TSA of the box.

TSA of cube=6a^2

a=45cm or 0.45m(as cost is in meter)

TSA=6x0.45x0.45

  =1.215sq.m

Since it is to be painted both inside and outside, multiply by 2

=1.215x2= 2.43sq.m

Total cost=₹150 per sq.m

Cost of painting= Total Cost x Total TSA

=2.43x150=₹364.5

Cost of Painting Box inside and outside= ₹364.5

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