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The average length of the three wires of a, B and C is 12 decimeters. The ratio of their length is one-half to two-thirds to five sixths. How many meters is the length of each wire of a, B and C
1/2:2/3:5/6=3:4:5
3+4+5=12
The length of a, B and C is 3, 4 and 5 meters respectively
A cuboid glass jar is 8 decimeters long, 4 decimeters wide, 7 decimeters high, and the water depth is 4.2 decimeters. If a square iron block with an edge length of 4 decimeters is put in, how many decimeters is the water depth? The required process
Set water depth x decimeter
Then 8 * 4 * (x-4.2) = 4 * 4 * 4
x=6.2
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A cuboid glass tank is eight decimeters long, four decimeters wide and five decimeters high. A cubic iron block three decimeters long is placed in the tank. The water depth in the tank is two decimeters. Then 23 liters of water is poured into the tank. How many meters does the water level rise in the tank
23 divided by (8 times 4) = 0.71875 decimeters
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