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guajiro [1.7K]
3 years ago
6

HELP HELPP PLEASEEEE!

Mathematics
2 answers:
umka21 [38]3 years ago
8 0

Answer:

Step-by-step explanation:

volume of pyramid with square base=a^2(h/3)

84=a^2*7/3

84*3/7=a^2

252/7=a^2

36=a^2

\sqrt{36=a

6=a

therefore length=6

Ganezh [65]3 years ago
6 0
The length is b 12 !
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