If T and R are tread and rise respectively of a stair, then___________

1.	If T and R are tread and rise respectively of a stair, then_______________?
A.	2R + T = 60
B.	R + 2 T = 60
C.	2R + T = 30
D.	R + 2 T = 30
Answer» B. R + 2 T = 60

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If T and R are tread and rise respectively of a stair, then_______________?

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