The radius and the height of a right circular cone are in the ratio of 5∶12and its volume is 2512cm3 .Find the curved surface area and total surface area of the cone.
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ANSWER
Let radius=5x and height=12x
Volume of cone=31πr2h
2512=31∗3.14∗5x∗5x∗12x
3.142512∗3=300x3
300x3=2400
x3=3002400=8
x=2
Radius=5∗2=10cm
Height=12∗2=24cm
l=root(r2+h2)
=root(102+242)
=root(100+576)
=676
=26 cm
HOPE IT HELPS!!!!!!!
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