From the above figure, a uniform meter rule is suspended by two cords from a height. Calculate T?
Attached Figure / Diagram
A
11.25N
B
14.8N
C
19.24N
D
16.77N
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
T x 80 + 15 x 10 = W x 50
80T + 150 = 50W - - -- - - - - -(1)
T + 15 = W - - - - - - - - - - - (2)
80T + 150 = 50(T + 15)
80T + 150 = 50T + 750
30T = 750 - 150
30T = 600
T = 20N
The closest option is 19.2N
Source: WAEC / JAMB / NECO Classroom Archive (Record #74492)