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Q. |
If T and R are the tread and rise of a stair which carries a load w per square metre on slope, the corresponding load per square metre of the horizontal area, is |
A. | w (R + T)/T |
B. | w (R² + T²)/T |
C. | w (R + T)/T |
D. | w (R/T) |
Answer» B. w (R² + T²)/T |
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