There are two questions in Grade 6 process answers required .

1. How many square centimeters is the cross-sectional area of the tree?

Solution: Radius length: cm).

Cross-sectional area: square centimeters).

Answer: Slightly. 2. Add a wooden cover to the water tank with a diameter of meters, the diameter of the wooden cover is more than the diameter of the cylinder mouth, and the area of the wooden cover is how many square meters?

Radius of the wooden cover: (m).

The area of the wooden cover: square meters).

When; square meters).

Answer: Slightly.

Take 1) cm).

8 8 square centimeters).

A: The cross-sectional area is a square centimeter.

2) m) m²).

A: The area is square meters.

1. Analysis: Because of the cylinder and the cone of equal height at the same bottom, the volume of the cylinder is 3 times that of the cone, that is, the cylinder is cut into 3 sections on average, and each segment is the same as the cone.

Solution: 12 3 = 4 (cm).

A: At this time, the water in container B is 4cm.

2. Analysis: The surface area of the rectangle is increased compared with the original, and two rectangles with a radius of width and height are added.

Solution: The radius of the bottom surface of the cylinder is 400 2 20=10 (cm) The volume of the cylinder is cubic centimeters).

Answer: The volume of the cylinder is 6280 cubic centimeters.

The first question is cubic centimeters.

314 cm.

The second question is 400 2 = 200 square centimeters.

r = 200 20 = 10 cm.

Cubic centimetre.

If you adopt me, I'll explain it to you slowly.

2L is 2 liters cubic decimeter.

The product of the inner term is equal to the product of the outer term, please see ** for the detailed process.

Hello Dragonfly:

1.A, B and C collected a total of 17 kilograms of tree seeds, and A said, "I collected half of them.

B said, "I have gathered a third of it." C said:

I collected one-ninth of them. "It is known that the tree species collected by each of the three people are whole kilograms, so how many kilograms are collected?

The ratio of A, B and C collection is:

1 2:1 3:1 9 9:6:2 (multiply 18 on the left side of the equal sign).

A collected: 17 9 (9 6 2) 9 (kg).

B collected: 17 6 (9 6 2) 6 (kg).

C collected: 17 2 (9 6 2) 2 (kg).

2.A car travels 750 meters per minute from A to B and is expected to arrive in 50 minutes, but when the car travels to 3 5 miles, it breaks down and is repaired in 5 minutes. If you still need to reach point B within the scheduled time, how many meters per minute does the car have to travel the rest of the journey?

Already lined: 750 50 3 5 22500 (m).

Faster per minute than the original:

750 50 (1 3 5) (50 50 3 5 5) 750 250 (m).

1.Take one kilogram of tree seeds, become 18 kilograms, A, B and C are 9 kg, 6 kg, 2 kg, 2The answer is rice.

The total distance is 750*50=37,500 meters, and the remaining 2 5 distances are 37,500*2 5=15,000 meters.

The remaining time is 50*2 5-5=15 minutes and the speed becomes 15000 15=1000

1000-750 = 250 meters faster than the original.

1-30%=70% 70% multiplied by 50%=35% 20 divided by (35%-30%) = 400 (pages).

The index has a total of 400 pages.

2012 is a leap year, February is 29 days, 366 divided by 7 = 52 (week) - 2 (days) Because June 1, 2011 is a Wednesday, so the first birthday of Xiaohua's younger brother, that is, June 1, 2012, is a Friday.

÷[1-30%)*50%-30%]=20÷(35%-30%)

400 pages. Wednesday, Thursday, Friday, Saturday, Sunday, Monday, Tuesday; This is the law of periodic arrangement.

The remainder is 3, so it is the third in the cycle.

It's Friday.

Good luck with your learning and progress.

A car transported 3 times, 54% of the total number was transported, that is, 18 of the total number was transported at a time, and the remaining tons of goods were transported 2 times at this rate, accounting for 1-5 * 18 = 10 of the total, so the total should be:

The premium per person is:

15,000* yuan.

And because the total insurance premium is 10,920 yuan, there are teachers and students:

10920 15 = 708 people.

1 100%-30%=70% is the remaining 70% of the total * 50% = 35% is found to be the next day read the whole book 35% 30% = 5% is to find the next day to read the whole book more than the first day 20 & 5% = 400 pages.

In the first question, the book has x pages.

Multiply by x and multiply the results yourself.

Question 2: Friday.

1, here put (

Advertising business volume in April) is regarded as the unit "1" (

The increase in business volume in May compared to April) is equivalent to (advertising business volume in May.

8/8 of the ropes, let these two ropes are the source contains x meters long, and the rest are y1 and y2 respectively, then according to the title there are y1 = (m, y2 = (m, therefore, y1-y2 = when x=1, y1-y2 = 0, the two ropes are the same hail and laugh long, when x<1, y1-y2<0, use the remaining 2/5 of the left, when x>1, y1-y2>0, use the 2/5 of the tall rotten remaining more.

Question 6: If the book has x pages, then 1 6x pages have been read, and 5 6x pages have not yet been read.

Column equation: 1 6x+10=25%x, x=120 (page).