the base area ofa cone is 38.5cm its volume is 77cm find its height
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Base area of a cone = 38.5cm2
volume of cone = 77cm3
22/7r2=38.5
r2= 38.5*7/22
r2= 269.5
r2= 12.25
r=3.5
1/3*22/7*3.5*3.5*h=77
22*(3.5)2*h=77*21
22*12.25*h=1617
269.5*h=1617
h=1617/269.5
h=6cm
volume of cone = 77cm3
22/7r2=38.5
r2= 38.5*7/22
r2= 269.5
r2= 12.25
r=3.5
1/3*22/7*3.5*3.5*h=77
22*(3.5)2*h=77*21
22*12.25*h=1617
269.5*h=1617
h=1617/269.5
h=6cm
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