Answers

2016-03-12T16:51:45+05:30
Since, volume=1650cm^3
1/3×pi×r^2×h=1650cm^3
1/3×22/7×r^2×28=1650
22/21×r^2×28=1650
88/3×r^2=1650
r^2=1650×3/88
r^2=450/8=56.25
r=7.50cm
Now,slant height=root under (r^2+h^2)
root under (7.50^2+28^2)
root under ( 56.25+784)
root under 840.25
28.98cm(approx)
now,area of base of cone=pi×r^2
=22/7×7.50^2
= 22/7×56.25
=176.785cm^2(approx)
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