Question

A body weighs 8 gm, when placed in one pan and 18gm, when placed in the other pan of a false balance. The beam is horizontal (when both the pans are empty), the true weight of the body is

• A. 13 gm
• B. 12 gm
• C. 15.5 gm
• D. 15 gm

Answer 1

The correct option is B 12 gm

For given condition true weight $=\sqrt{W_1{W}_2}=\sqrt{8\times 18}=12gm$.