Question

A body weights 24.2g when placed in one pan of a balance and 20g when placed in other. What is the true mass of the body if the arms have unequal length ?

• A. 24.2g
• B. 20 g
• C. 22 g
• D. 22.1 g

Answer 1

Answer: (C)

22 g

Answer 2

M = $\sqrt { \mathrm { M } _ { 1 } \mathrm { M } _ { 2 } }$

M = $\sqrt { 24.2 \times 20 }$ = $\sqrt { 484 }$ = 22 g