= 20 g, 
= 70 g and the total weight of 10 
10 
and 10 
is 3200 g, then what is the weight of 
?
A) 70 g
B) 190 g
C) 90 g
D) 20 g
Correct Answer: A
Solution :
We have,
?(i) 
?.(ii) 
=3200 kg 
[using (i) and (ii)] = 3200 
From (i), we nave 
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