railway RRB JE (CBT I + CBT II) Mock Test 2024 Quantitative Aptitude Mensuration Solid Figures

यदि एक बेलन का व्यास और ऊँचाई क्रमशः d सेमी और \(\frac{d}{2}\) सेमी है, तो इसका आयतन कितना है?

1
\(\pi\frac{d^{2}}{2} \) सेमी3
2
\(\pi {d}^2\) सेमी3
3
\(\pi\frac{d^{3}}{8} \) सेमी3
4
\(\pi\frac{d^{2}}{4} \) सेमी3
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