The curved surface area of cone is 198cm square and the radius is 7cm find the volume of the cone
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8
A/q,
πrl=198
therefore,
l=198×7/22×7
=9
now h is √l^2-r^2
is √81-49
is 4√2
vol. is pie× r×r×h /3
is 22× 7 ×7× 4√2 by 7×3
is 154 ×4√2 by 3
is 51.3×4√2
is 213.2√2 cm^3
Hope it helps you
Please Mark as brainliest answer
πrl=198
therefore,
l=198×7/22×7
=9
now h is √l^2-r^2
is √81-49
is 4√2
vol. is pie× r×r×h /3
is 22× 7 ×7× 4√2 by 7×3
is 154 ×4√2 by 3
is 51.3×4√2
is 213.2√2 cm^3
Hope it helps you
Please Mark as brainliest answer
Answered by
2
curved suface area of cone=pai×r×l= 198
22/7×7×l= 198
l= 198/22=18/2=9
l^2=r^2+h^2
9^2=7^2+h^2
h^2=81-49=32
h=4root2
volume of cone=1/3×pai×r^2×h=1/3×22/7×7×7×4root2=22×9.3root2=204.6root2
22/7×7×l= 198
l= 198/22=18/2=9
l^2=r^2+h^2
9^2=7^2+h^2
h^2=81-49=32
h=4root2
volume of cone=1/3×pai×r^2×h=1/3×22/7×7×7×4root2=22×9.3root2=204.6root2
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