Answer:
140 oranges
Step-by-step explanation:
From the Question, we know that the pyramid has 7 layers
The number of oranges in the first layer is = 1
Hence, the number of oranges in a pile is calculated as:
1² + 2² + 3² + 4² + 5² + 6² + 7²
= 1 + 4 + 9 + 16 + 25 + 36 + 49
= 140 oranges
5.47 is the square root of 30.
