The gravitational field strength at the surface of a planet of radius R and density p is 80.The value of gravitational field strength if the density is kept fixed but the volume is doubled will b

because growing process had stoped after 4-5 year

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

it was given as a lesson and guide for prayer.