16) A
g = GM
R²
gR² = GM
M = gR²
G
Substituting the values,
M = 10 x (6 x 10⁶)²
7 x 10⁻¹¹
M = 10 x 36 x 10¹
7 x 10⁻¹¹
M = 36 x 10¹³
7 x 10⁻¹¹
M = 36 x 10 ¹³⁻⁽⁻¹¹⁾
7
M = 36 x 10²⁴
7
M = 5.15 x 10²⁴ ≈ 5 x 10²⁴