Question: Extend 15. A farmer wants to build a wall using concrete blocks. She draws a diagram showing the wall and identifies the corners of the

Extend 15. A farmer wants to build a wall using concrete blocks. She draws a diagram showing the wall and identifies the corners of the "cubes." Each concrete block is the same size as two cubes. a) How many concrete blocks does the farmer need? bj Each concrete block is 20 cm by 20 cm by 40 cm. What are the outside dimensions of the walled enclosure, in inches? () The farmer wants to build a new wall to fit tightly around the outside of the first one. How many concrete blocks are needed? Explain how to get the answer from your answer to part a)

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