Nádoba

Nádoba tvaru kostky je naplněna vodou do poloviny své výšky. Pokud dolijeme 20 l vody, bude nádoba naplněna do tří čtvrtin své výšky. Jaký je objem celé nádoby?

Correct answer:

V =  80 l

Step-by-step explanation:

V/2+20=3/4 V  V=80 l



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