6280=1:3×3.14×30×30×h
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ans ..
.....h=6.67
solve..
6280=1:3×2826h
6280=942h
h=6280/942
h=6.67
.....h=6.67
solve..
6280=1:3×2826h
6280=942h
h=6280/942
h=6.67
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