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1. On a 1:40000 map, the distance between the two places is 6cm. What is the actual distance between the two places? 2. The area and volume of the bottom of a cylinder and a cone are equal. The height of a cone is 9 cm, and the height of a cylinder is? 3. The distance from land a to land B is 160 km, and () cm should be drawn on the map of 1:4000000 4. Cut the 1.2-meter-long cylindrical steel into three sections according to the ratio of 1:2:3, and increase the surface area by 56 square centimeters. The volume of the longest section is () cubic centimeters more than that of the shortest section?
1. On a 1:40000 map, the distance between the two places is 6cm. What is the actual distance between the two places?
6 × 40000 = 240000cm = 2.4km
2. The area and volume of the bottom of a cylinder and a cone are equal. The height of a cone is 9 cm, and the height of a cylinder is?
9 △ 3 = 3cm
3. The distance from land a to land B is 160 km, and (4) cm should be drawn on the map of 1:4000000
160 km = 1.6 million cm
16000000 △ 40000000 = 4cm
4. Cut the 1.2-meter-long cylindrical steel into three sections according to the ratio of 1:2:3, and the surface area will increase by 56 square centimeters. The volume of the longest section is 560 cubic centimeters more than that of the shortest section?
The surface area is increased by 4 sections
One section area = 56 △ 4 = 14 square centimeter
1.2m = 120cm
1+2+3=6
（120÷6×3-120÷6×1）×14
=40×14
=560 CC
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