find the area of a white sheet required to prepare a cone with height of 21cm and the radius of 20cms
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Answered by
17
Hii friend,
Height of cone = 21 cm
Radius of cone = 20 cm
Slant height= ✓(H)² + (R)² = ✓(21)² + (20)² = ✓441+400 = ✓841 = 29 cm
Area of white sheet required to prepare a cone of height 21 and radius 20 = CSA of cone = πRL = 22/7 × 20 × 29 = 12760/7 = 1822.8 CM²
HOPE IT WILL HELP YOU..... :-)
Height of cone = 21 cm
Radius of cone = 20 cm
Slant height= ✓(H)² + (R)² = ✓(21)² + (20)² = ✓441+400 = ✓841 = 29 cm
Area of white sheet required to prepare a cone of height 21 and radius 20 = CSA of cone = πRL = 22/7 × 20 × 29 = 12760/7 = 1822.8 CM²
HOPE IT WILL HELP YOU..... :-)
Answered by
2
WE WILL FIND THE TSA OF A CONE
SO TSA= 3078.96CM^2
THUS 3078.96CM^2 SHEET IS REQ. TO MAKE ACONE OF GIVEN MEASURES.
SO TSA= 3078.96CM^2
THUS 3078.96CM^2 SHEET IS REQ. TO MAKE ACONE OF GIVEN MEASURES.
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