Electric Field Questions

A spherical conductor of radius $10\text{cm}$ has a charge of $3.2\times 10^{-7}\text{C}$ distributed uniformly. What is the magnitude of electric field at a point $15\text{cm}$ from the centre of the sphere?($\frac{1}{4\pi {ϵ}_0}=9\times 10^9{\text{N m}}^2{\text{/C}}^2$)