find the cost of painting the all round outer surface of a box with lid 60 cm long 40cm wide and 30cm high at 50p per 20cm
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Answer:
27Rs
Step-by-step explanation:
l=60
b=40
h=30
rate= 50p/20cm
TSA of cuboid = 2(lb+bh+lh)
=2(60 X 40 + 40 X 30 + 60 X 30)
=2( 2400+1200+1800 )
=2 X 5400
=10800
total cost= 10800/20.(since it costs 50p for 20cm)
= 540 X 50p
= 2700p
= 27Rs (1Rs=100p)
hope it helps. peace✌️
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