find the cost of painting the outer surface of a closed bix which is 90cm long.60cm broad and 45cm high at the rate of 75 paise per 20cm2
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Answer:
surface area of cuboid = 2(lb+bh+hl)
l=90cm
b=60cm
h=45cm
putting in formula
=2(lb+bh+hl)
=2(90+60+45)
=2(195)
=390m
ATC,
75 paise per 20cm
390/20=19.5
19.5*75
1462.5 paisa
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