Which of the following options shows lengths arranged in ascending order?

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10 mm, 1 km, 5 cm, and 2 ft

10 mm, 1 km, 2 ft, and 5 cm

2 ft, 10 mm, 1 km, and 5 cm

10 mm, 5 cm, 2 ft, and 1 km

answer is D.

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Detailed Solution

We must express all of the specified lengths in a single unit in order to compare them.
The given lengths are: 10 mm, 1 km, 2 ft, and 5 cm

Let's express all the lengths in mm.
1 km = 1000000 mm ( $∵$ 1 km= 1000 m and 1 m= 1000 mm)

5 cm = 50 mm ( $∵$ 1 cm = 10 mm)

2 ft = 609.6 mm ( $∵$ 1 ft= 304.8 mm)

Therefore, the correct increasing order is 10 mm, 5 cm, 2 ft, and 1 km.

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