The sixth grade mathematics cylinder volume application problem.

1. A cylindrical water tank contains water with a depth of 10cm, and the bottom area of the water tank is 300 square centimeters. If a cubic iron block with a length of 6 cm is put into the water, how many centimeters will the water surface rise?

(6×6×6)÷300

=2 16÷300

= 0.72 cm

2. A cylinder is a square with a side length of 9.4dm when its side is unfolded. What is the volume of this cylinder?

3. 14×(9.42÷3. 14÷2)^2×9.42

=3. 14×2.25×9.42

= 66.5523 (cubic decimeter)

3. The vegetable greenhouse covered with plastic film is 15m long and the cross section is a semicircle with a radius of 2m.

(1) How many ㎡ plastic films are covered on this greenhouse?

3. 14×2^2+3. 14×2× 15

= 12.56+94.2

= 106.76 m2

(2) How big is the space in the greenhouse?

3. 14×2^2÷2× 15

=6.28× 15

= 94.2 cubic meters