What is the greatest number of 3 -by-7 rectangles that can be placed inside an 80-by-90 rectangle with no overlapping?
A.
312
B.
330
C.
334
D.
342
Exam No：2018 First Round Grade 6 Year：2018 Question No：34
Answer:
D
Knowledge points:
G6 - Geometry - Area (Triangles, Trapezoids, Composite)
Solution:
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