A block of mass m and surface area A jus...

A block of mass m and surface area A just begins to slide down an inclined plane when the angle of inclination is `pi//5`. Keeping the mass of the block same, if the surface area is doubled, the inclination of the plane at which the block starts sliding will be

`pi//5`

`pi//10`

`2pi//5`

`pi//5sqrt2`

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