Refer to the attachment.
11th Rd sharma question from surface area volume chater. Please solve this according.
I'll be much obliged if you answer correctly.
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Refer to the attachment.
11th Rd sharma question from surface area volume chater. Please solve this according.
I'll be much obliged if you answer correctly.
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Answer:
Total surface area of a tank= 2× curved surface area of hemisphere + curved surface area of cylinder
Radius of hemisphere =2d=21.4=0.7 m
Curved surface area of hemisphere
=2πr2=2×722×0.7×0.7=3.08 m2
2× curved surface area of hemisphere
=2×3.08 m2=6.16 m2
Radius of cylinder, r=2d=21.4=0.7 m
Height of cylinder, h=8 m
Curved surface area of the cylinder
=2πrh=2×722×0.7×8=35.2 m2
Total surface area of the storage tank
=35.2+6.16=41.36 m2
Cost of painting its surface area at
Rs 20 per m2=41.36×20=Rs.827.2
Step-by-step explanation:
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