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Question

Which of the following is/are correct?

i.1 km=103 m

ii.1 km=105 cm

iii.1 km=107 mm



A

Only i

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B

i and ii

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C

i and iii

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D

i, ii and iii

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Solution

The correct option is A

i and ii


Kilometre is a unit of measuring distance. The word ‘kilo’ means thousand. So, one kilometre = 1000 metres.

1 km=1000 m=103 m

We know that, 1 m=100 cm

1 km=1000×100 cm=100000 cm=105 cm

Also, 1 cm=10 mm

1 km=100000×10 mm=1000000 mm=106 mm

Out of the given options, i and ii are correct.


Mathematics

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