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(40) The acceleration due to gravity (g) on theGMsurface of earth is g =R2, where M is massof earth, R is radius of earth and G isuniversal gravitational constant. If mass ofearth decreases by 2% and radiusdecreases by 196, then percentage changein value of g is(aZero(c)4% increase (d) 4% decrease(b) 2% decrease

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