3. 14×( 10÷2) 2 × 10

=3. 14×5 2 × 10

=3. 14×25× 10

=785 (cubic centimeter)

785 cubic centimeters =785 milliliters

785 ml > 500 ml.

A: This cup can hold a bag of 500 ml milk.

②500÷[3. 14×( 10÷2) 2 ]

=500÷(3. 14×25)

=500÷25÷3. 14

=20÷3. 14

≈6 cm

Answer: The height of soybean milk in the cup is about 6 cm.