Question

the cone radius is 3.5mm and height is 6.5mm . if we cut the cone vertically into 2 equal halves the find LSA,TSA and volume of one part

Answer 1

r=3.5mm=3.5×10^-3
h=6.5mm=6.5×10^-3
l=7.38
so,LSA=πrl=3.14×3.5×7.38=81.1062
TSA=πr(r+l)=3.14×3.5(3.5+7.38)=119.57
volume of one part,
1/6πr^2h=1/6×3.14×3.5×3.5×6.5=41.670

Answer 2

lsquare=rsquare+hsquare=3.5×3.5+6.5×6.5=12.25+42.25=√54.50=7.38241153
lsa=πrl=3.14×3.5×7.38241153=81.1327027mm
tsa=πr(r+l)=3.14×3.5(3.5+7.38241153)=119.597702mm
volume=1/3πrsquare×h=1/3×3.14×3.5×3.5×6.5=
83.34083mm÷2=41.67041
HOPE MY ANSWER IS SATISFACTORY TO UU