Q53: Using the approximation

2018 Test A Math · Question 53 of 57

Using the approximation 2.54 centimeters = 1 inch, how many centimeters are in 4 feet 7 inches?

  • A21.65
  • B119.38
  • C121.92
  • D139.70
Show the answer

Correct answer: D

Convert 4 ft 7 in. to inches. Since 12 in. = 1 ft :

4(12) + 7 = 55 inches

Multiply that by the conversion

2.54 cm = 1 in.

55 × 2.54 = 139.70 cm