Question
Some wafers are displayed an equal distance from one another on a table. The distance between the fifth and the tenth wafers is 30 cm. The distance between the eighth and the last wafer is 54 cm. How many wafers are there altogether?
4 m

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Some wafers are displayed an equal distance from one another on a table. The distance between the fifth and the tenth wafers is 30 cm. The distance between the eighth and the last wafer is 54 cm. How many wafers are there altogether?