Question

find the total surface area of a closed cylinderical tank it's diameter is 20 cm and height is 25 cm​

Answer 1

Step-by-step explanation:

r=10cm,h=25cm

Total surface area=2πr(r+h)=2π(10)(10+25)=700π=2200cm

2

=0.22m

2

Area of circle=π10

2

cm

2

=0.0314m

2

Area of tin=0.1885

Cost of painting of tin Rs.300perm

2

=0.1885×300=Rs.56.57

Answer 2

Answer:

r=10cm,h=25cm

Total surface area=2πr(r+h)=2π(10)(10+25)=700π=2200cm square

 

=0.22m square

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