Answer:

Step-by-step explanation:
The given figure shows a triangular pyramid having 16 units as height. The base of pyramid is triangle.
The area of a triangular pyramid is given by :

Where
b is the area of base

So, the required area is equal to
.
B. four times the value of y = the value of y+9
Answer:
12.B
13.C
17.D
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Answer:
9
Step-by-step explanation:
225/25= 9
9 batches