a rectangular box is 10cm long 5 cm broad and 4 cm in height how much will it cost to paint the outer surface of the box at rate of Rs 40 per sqcm?
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Answer:
given that,
length=10cm
breadth=5cm
height=4cm
TSA of rectangular box= 2(lb+bh+hl)
=2(10*5+5*4+4*10)
=2(50+20+40)
=2(110)
=220 cm²
=> ₹40 per cm²
=> 40*220
=> 8800
ther fore ₹8800 is required to paint outer surface.
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