# If Johnny has a rectangular aquarium with a length of 16 decimeter, a width of 15 decimeter and a height of 10 decimeter, how much water can it hold?

2
by cjncolet

2014-12-22T08:30:52+08:00

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Aaah, in this question, the clue that you should look at, is the phrase "how much water it can hold?"
If the statement is like that, you can be sure that it is talking about "volume."
So here it is:
Given:    Rectangular aquarium (rectangular prism, if am not mistaken) = shape
Length = 16 dm
Width = 15 dm
Height = 10 dm
Required: How much water can it hold?
Operation: Multiplication
Formula:   Volume of Rectangular Prism = Length x Width x Height
Mathematical Sentence:  V = L x W x H
V = 16 dm x 15 dm x 10 dm
(use the left-to-right method in this one)
V = 240 dm^2  x 10 dm
V = 2, 400 dm ^3