Current location - Training Enrollment Network - Mathematics courses - Mathematical problems of horses and boots
Mathematical problems of horses and boots
(1)2dm equals 20cm.

The volume of the conical part is equal to the volume of the rising part after the water in the cylindrical glass tank is 20/2= 10 cm.

10x10x3.14x6 =1884 (cubic centimeter)

So the volume of the conical part is 1884 cubic centimeters.

(2) Because several girls were transferred later, the ratio of boys to girls was 6:5. At this time, * * * has 880 students, 880X5/ 1 1=400 (people).

880-400=480 (person)

So there are 480 boys and 400 girls, so there are 450 girls. 450-400=50.

Move 50 girls.

(3) 1080÷(40%+50%)

= 1080÷0.9

= 1200 (yuan)

So the original price of these two boots is 1200 yuan per pair.