A. 30cm
B. 10cm
C. 20cm
D. 25m
Correct Answer:
Option C = 20cm
Explanation
Clockwise moment = Anti-clockwise moment
10 x 30 = 15 x X
X = 20cm
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![A beam PQ pivoted at P carries a load of 80N as shown above. Calculate the effort E, required to keep it horizontal. [neglect the weight of the beam]](https://myschool.ng/storage/classroom/4288835607_maths-15.jpg "A beam PQ pivoted at P carries a load of 80N as shown above. Calculate the effort E, required to keep it horizontal. [neglect the weight of the beam]")