and 
then, What is the weight of 
?
A) 6 kg
B) 8 kg
C) 9 kg
D) 7 kg
Correct Answer: D
Solution :
Weight of two A blocks = 12 kg \[\therefore \]Weight of 1 block \[A=\frac{12}{2}=6\] kg Now, Weight of block A + Weight of block B =14 kg \[\therefore \]Weight of block B \[=\text{ }\left( 14-6 \right)\]kg = 8 kg Weight of block B + Weight of block C=15kg \[\Rightarrow \] Weight of block C \[=\text{ }\left( 15-8 \right)\]kg =7 kg
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