Ratiram is a milk seller in the city. He sells $17$ liters of milk every day at Rs $48$ per liter. How much does he earn?

Given:

No. of liters of milk sold by him everyday = $17$

S.P. of $1$-liter milk = Rs $48$

To find:

Total earning of Ratiram

Calculation:

S.P. of $1$-liter milk = Rs $48$

Earning by selling $17$liter milk =?

By using the cross multiplication method,

Earning by selling $17$liter milk = Rs $17\times 48$

Solving the multiplication,

$17 \times 48=17\times (40+8)$

⟹ $17 \times 48=(17\times 40)+(17\times 8)$-----(1)

⟹ $17\times 40=680$-----(2)

⟹ $17\times 8=136$-----(3)

Substituting values of (2) & (3) in (1), we get,

$17 \times 48 =680+136$

                   = Rs $816$

Therefore, the total earnings of Ratiram are Rs$816$.

Hence, the correct option is 'C'.