A shopkeeper has corn flour and wheat flour. The ratio of the weight of the corn flour to the weight of the wheat flour is 3 : 5. The weight of the corn flour is 21 pounds. What is the weight of the wheat flour?

35 pounds

Step-by-step explanation:

To solve this, we can set up a proportion.

Let's name the weight of the wheat flour "x."

3/5=21/x

Cross multiply to solve.

3*x=5*21

3x=105

x=35

The weight of the wheat flour is 35 pounds.