Question
Question: If meter scale is balanced at its mid point and unknown mass is hanged at 30 cm mark which is balanc...
If meter scale is balanced at its mid point and unknown mass is hanged at 30 cm mark which is balanced by 60 gm mass hanging at 80 cm mark. Then unknown mass is –
A
30 gm
B
40 gm
C
60 gm
D
90 gm
Answer
90 gm
Explanation
Solution
m1l1 = m2l2
m × 20 = 60 × 30
m = 90 gm