Approximately how many inches are in 2500 millimeters? given 1 in = 2.54 cm, 1 ft = .3048 m, 1 mi = 1.61 km.

Let's begin with 2500 mm and convert this to cm.  

2500 mm = 250 cm

Next, convert 250 cm to inches.  Recall that 1 inch = 2.54 cm.

Then (250 cm)(1 inch) / (2.54 cm) = (250 cm) (1 in)/ (2.54 cm)

= (250/2.54) inches = ? inches