Question

An object is weighed on a balance, whose pans are not equal in masses, when object is placed in the left pan, the object appear to weigh 9.30 g, but when placed in the right pan, it appears to weigh 10.62 g. What's the correct mass ?

• A. 19.92 g
• B. 10.62 g
• C. 9.96 g
• D. 9.30

Answer 1

Answer: (C)

9.96 g

Answer 2

m = $\frac { \mathrm { m } _ { 1 } + \mathrm { m } _ { 2 } } { 2 }$ = $\frac { 9.30 + 10.62 } { 2 }$ = $\frac { 19.92 } { 2 }$ = 9.96 g