An open box is made of wood 3 cm thick.Its external dimensions are 1.46m,1.16m and 8.3dm.Find the cost of painting the inner surface of the box at75 paise per 100cm
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Outer dimensions
L=146cm
B=116cm
H=83cm
Inner dimensions
L=140cm
B=110cm
H=77cm
Inner area = LSA+BASE
=2h (l+b) + lb
=53900cm sq
Rate of painting = 75p for 100 cm sa1
So
Cost=53900×75÷100
=40425p
= Rs 404.25
Pls do the calculations by urself
L=146cm
B=116cm
H=83cm
Inner dimensions
L=140cm
B=110cm
H=77cm
Inner area = LSA+BASE
=2h (l+b) + lb
=53900cm sq
Rate of painting = 75p for 100 cm sa1
So
Cost=53900×75÷100
=40425p
= Rs 404.25
Pls do the calculations by urself
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