Rice eaten in a day= 100 g
Flour eaten in a day= 100g
Total Quantity of rice and flour eaten in a day = 200 g
Quantity of rice and pulses eaten in 6 days = 200 x 6
= 1200 g
So, the quantity of pulses eaten by him in 6 days
= 13rd of 1200 g
= 1200 ÷ 3
= 400 g