Question

There are 2.54 centimeters in one inch. How many inches are there in 51.78 centimeters? Round your answer to the nearest thousandth.

Answer 1

2.54 cm in 1 inch......how many inches in 51.78 cm...

51.78 / 2.54 = 20.4 inches <==

or this way...

2.54 / 1 = 51.78 / x....2.54 cm to 1 in = 51.78 cm to x inches

cross multiply

(2.54)(x) = 51.78)(1)

2.54x = 51.78

x = 51.78 / 2.54

x = 20.4 inches <==