Question

The bar used for defining the standard metre at the International office of weights and measures at Sevres near Paris, is composed of

a.

50% platinum and 50% iridium

b.

60% platinum and 40% iridium

c.

70% platinum and 30% iridium

d.

90% platinum and 10% iridium

Posted under Civil Engineering

Answer: (d).90% platinum and 10% iridium

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Q. The bar used for defining the standard metre at the International office of weights and measures at Sevres near Paris, is composed of

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