Current location - Training Enrollment Network - Mathematics courses - Math problem (summer homework for grade six)
Math problem (summer homework for grade six)
I have solved 1 and 2, and the meaning of the third question is not clear.

One. Solution: Suppose a box of tea leaves contains a layer of tea barrel. The formed box is a cuboid.

Judging from the title: the bottom of a cuboid is 0.5 meters long, 0.2 meters wide and 0.2 meters high. What is sought here is the surface area of the box. )

Then the surface area is

0.5x0.2x4+0.2x0.2x2=2 (square meters).

After inspection, this is the smallest surface area.

Two. Solution: the weight of black tea is 400x( 1+25%)=500 (ton); The weight of green tea is 500x( 1-25%)=375 (tons).

Three. If the diameter of that flower bed is really ten centimeters, no flowers can be planted, because the perimeter of the flower bed is only 0.1x π = 0.1π (m);

If the diameter of that flower bed is really ten centimeters, you can plant grass 0.05x0.05xπ=0.0025π (square meter).

This is all my answer.

Attachment: I am a sophomore.