Question

Which one of the following is the longest length?

(a) 100 m
(b) 104 µm
(c) 107 nm
(d) 102 mm​

Answer 1

Answer: 100 m

Step-by-step explanation:

1 μm =
`10^(-6)` m = 0,000001 m

1 nm =
`10^(-9)` m = 0,000000001 m

1 mm =
`10^(-3)` m = 0,001 m

∴ 100 m es la mayor longitud

Answer 2

Okay, let's convert all the lengths to the same unit to compare:

(a) 100 m = 100 meters

(b) 104 μm = 104 micrometers = 104 × 10^-6 meters = 0.000104 meters

(c) 107 nm = 107 nanometers = 107 × 10^-9 meters = 0.000000000997 meters

(d) 102 mm = 102 millimeters = 102 × 10^-3 meters = 0.0102 meters

The longest length is:

(a) 100 m = 100 meters

The answer is option (a).