Diamonds puzzle

The puzzle is composed of paper diamonds. One diamond (rhombus) has a diagonal 3.4 cm long and a corresponding height of 2.5 cm. How much paper in dm squared is needed for 60 diamonds?

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You need to know the following knowledge to solve this word math problem:

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area of a shape
rhombus

Units of physical quantities

unit conversion
area

Grade of the word problem

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