Answer:
3.5m
Explanation:
Volume of pyramid = lwh÷3
25.77 = [(4.7)² × x] ÷ 3
25.77 × 3 = 22.09x
77.31 = 22.09x
x = 77.31 ÷ 22.09
= 3.49
= 3.5m
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