Solution)
Given,
density of rock = 3200 kg/m3
density of the oil = 1000 kg/m3
value of g due to oil deposit
g=Gm_oil/D^2
Let,
g=g_oil-g_rock
So, g=GV(g_oil-g_rock)/D^2
V=gD^2/G(g_oil-g_rock)
So, V=9.8*(-2*10^-7)(2500m)^2/(6.67*10^-11(1000-3200 ))
V=8.34*10^7 m^3
Here, mass of the oil m_oil=g_oil*v
=8.34*10^7 m^3*1000
=8.34 *10^10 kg (Ans)
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