A. 8g
B. 25g
C. 30g
D. 40g
E. 50g

Correct Answer:

Option D – 40g

Explanation

W = pvg = (2.5 x 10 x 60)/100 = 0.500N.
Upthrust = wt of liquid displaced = pvg water.
pvg water = (1x20x10)/2 = 0.10N
Reading => 0.500N – 0.100N = 0.4N = 40g

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