Asolution of h2so4(aq) with a molal concentration of 4.80 m has a density of 1.249 g/ml. what is the molar concentration of this solution?

Imagine we have mass of solvent 1kg (1000g)
According to that: 
= 4.8 mole * 98 g/mole = 470g
 m(H2SO4)  which is =470g

m(solution) = m(H2SO4) + m(solvent) = 470 + 1000 = 1470 g
d(solution) = m(solution) / V(solution) =>
=> 1.249 g/mL = 1470 g / V(solution) =>