a cylindrical tank has diameter of base 20 cm and height 25 cm is open at the top. find the cost of painting the tank at Rs 300 per m² . (use pie=3.14)
Answers
Answered by
14
Soln:-
r=10 cm
T.S.A= 2πrh +πr^2
=2×3.14×10×25 +3.14×10×10
=1570 cm^2+314 cm^2
=1884 cm^2
1m^2 cost =Rs 300
1cm^2=300/10000
Rs0.0300
Cost of painting the tank=Rs 0.0300×1884
=Rs56.52
r=10 cm
T.S.A= 2πrh +πr^2
=2×3.14×10×25 +3.14×10×10
=1570 cm^2+314 cm^2
=1884 cm^2
1m^2 cost =Rs 300
1cm^2=300/10000
Rs0.0300
Cost of painting the tank=Rs 0.0300×1884
=Rs56.52
Answered by
3
Answer:
Step-by-step explanation:
csa of cylinder =2*3.14*0.1*0.25
=0.157m sq
cost=300*0.157
=RS 47.1
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