railway RRB ALP (CBT 1 + CBT 2 + CBAT) Mock Test Series 2025 (New) Quantitative Aptitude Mensuration Solid Figures
What is the difference between the total surface area and the curved surface area of a hemisphere (in cm2) when the radius is 21 cm? (Takе π = \(\frac{22}{7}\))
1
1386
2
1495
3
1586
4
1376