In mid-day meal, at the rate of 150gm wheat and 100 gm rice per child per day, the total quantity of wheat and rice for 30 days for 60 children is

Correct option is A

​$$\textbf{Solution:} \\[5pt]\text{Wheat per child per day} = 150 \text{ gm} \\\text{Rice per child per day} = 100 \text{ gm} \\\text{Number of children} = 60 \\\text{Number of days} = 30 \\[10pt]\text{Total wheat per day for 60 children:} \\60 \times 150 = 9000 \text{ gm} \\[5pt]\text{Wheat for 30 days:} \\9000 \times 30 = 270000 \text{ gm} = \frac{270000}{1000} = 270 \text{ kg} \\[10pt]\text{Total rice per day for 60 children:} \\60 \times 100 = 6000 \text{ gm} \\[5pt]\text{Rice for 30 days:} \\6000 \times 30 = 180000 \text{ gm} = \frac{180000}{1000} = 180 \text{ kg} \\[10pt]\text{Total quantity of wheat and rice:} \\270 + 180 = 450 \text{ kg} \\[10pt]\boxed{\text{The correct answer is: (a) } 450 \text{ kg}}$$​​