Question

select the correct answer.
1 in = 2.54 cm
about how many millimeters are in 10.5 feet?
a. 1,260 mm
b. 3,200.4 mm
c. 320.04 mm
d. 266.7 mm

Explanation:

Step1: Convert feet to inches

Since 1 foot = 12 inches, for 10.5 feet, the number of inches is $10.5\times12 = 126$ inches.

Step2: Convert inches to centimeters

Given 1 in = 2.54 cm, so 126 inches in centimeters is $126\times2.54 = 320.04$ cm.

Step3: Convert centimeters to millimeters

Since 1 cm = 10 mm, then 320.04 cm in millimeters is $320.04\times10 = 3200.4$ mm.

Answer:

B. 3,200.4 mm