A cylinder has a radius of 12 cm and height of 15 cm find it's surface Area
Answers
✪Correct Question:
A cylinder has a radius of 12 cm and height of 15 cm. Find it's total surface Area And Lateral surface area .
Given:
- Radius of a cylinder, r = 12 cm
- Height of a cylinder, h = 15 cm
To find out:
Find the total surface area and Curved surface area.
Formula used:
- Total surface area of cylinder = 2r( h + r )
- Curved surface area of cylinder = 2rh
Solution:
( i ) Total surface area of cylinder = 2r( h + r )
= 2 × 22/7 × 12 ( 15 + 12 )
= 2 × 22/7 × 12 × 27
= 14,256/7
= 2036.57 cm²
( ii ) Curved surface area of cylinder = 2rh
= 2 × 22/7 × 12 × 15
= 7920/7
= 1131.42 cm²
Given:
• Radius of a cylinder, r = 12cm
• Height of a cylinder, h = 15cm
To find out:
Find the total surface area of curved surface area.
Formula used:
• Total surface area of cylinder = 2r(h + r)
• Curved surface area of cylinder = 2rh
solutions:
(1) Total surface area of cylinder = 2r(h + r)
=2 × 22/7 × 12(15 + 12)
=2 × 22/7 × 12 × 27
=14,256/7
=2036.57cm²
(2) Curved surface area of cylinder = 2rh
= 2 × 22/7 × 12 × 15
= 7920/7
= 1131.42cm².
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