34. A uniform meter scale balances at the 40 cm mark when weights of 10g and 20g are suspended from the 10 cm and 20cm marks. The weight of the metre scale is
(a) 50g
(b) 60g
(c) 70g
(d) 80g
Ans. c
(12)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)