How many kilometers are there in 25 micrometers?
Ans:
As there are 103 meters in a kilometer and 10-6 meters in a micrometer, so
25 μm = 25 x 10-6 m = 25 x 10-6 x 10-3 km
25 μm = 25 x 10-9 km = 25 /10 x 10-9 x 101 km
25 μm = 25 x 10-8 km
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