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Using common sense, either the people are very very small or the dimensions of the box is wrong!

Q: When inflated a rubber lifeboat takes the form of a rectangular box of dimensions 2 m x 1.5 m x 40 cm Without any load it floats how many 60 kg people can it carry before water flows into it?

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The answer depends entirely on how the dimensions change. It is possible to change the dimensions without changing the perimeter. It is also possible to change the dimensions without changing the area. (And it is possible to change the area without changing the perimeter.)

what are the quaities of a painting without depth or the illusion of three dimension

Impossible to determine without more information.

240 m3 - without using a calculator !

Most people will, without hesitation, say a rectangle. In actual fact, though, the paper DOES have a thickness. If it did not, then a stack of dollar bills would still have no height. So, at a very fine level of detail, it is shaped like a rectangular prism.

Related questions

It is impossible to answer the question without knowing what the "64 feet" refers to. The perimeter, or a misstated measure of area.

It is not possible to answer this question without knowing the shape of the field - circular, triangular, rectangular, etc.

The answer depends on the dimensions of the garden as well as how wide the fence panels are. Without the information, it is pointless to try and answer the question.

The answer depends entirely on how the dimensions change. It is possible to change the dimensions without changing the perimeter. It is also possible to change the dimensions without changing the area. (And it is possible to change the area without changing the perimeter.)

It is not possible to answer the question because:there is no such word as rectangler.the nearest alternative is rectangular, but that is an adjective, not a noun. That leaves the question without a subject. A rectangular pyramid, a rectangular prism, rectangular dipyramid, rectangular antipyramid? Who can say?

There is no such word as "rectangler". Rectangular, on the other hand, is an adjective and without a related noun in the question it is impossible to answer. For example, there are different numbers of edges on a rectangular plane figure, a rectangular pyramid, a rectangular prism, a rectangular bipyramid.

The volume of the prism (not prisim) depends on its shape. Information about the dimensions (not demensions) is not enough without knowing the shape of the cross section: circular, triangular, rectangular etc.

There is no sensible answer to this question. A milligram is a measure of area, with dimensions [M]. A millilitre is a measure of volume, with dimensions [L3]. A percentage is a ratio of numbers without dimensions. Basic dimensional analysis teaches that you cannot combine two values with different dimensions into one with no dimensions. At least, not without additional information.

We can't tell without more information. All we know is that when all three dimensions (length in ft, width in ft, height in ft) are multiplied together, the result is 1.2 We're not even so sure of that much, since you haven't told us that the box is a rectangular solid, i.e. all of its inside angles are right angles. It could be a hat-box or pill-box; then, it only has 2 dimensions.

To inflate something is to fill it with air. You can do that with an air pump, yes. Some things can be inflated without pumps, such as hot air balloons. And some pumps don't pump air.

No. The number of vertices can be increased without limit.

7000 is a pure number, without dimensions. It cannot be compared or converted to any form of acceleration which has dimensions [LT-2].