Chapter 1 Homework
Unit Conversions
Qu. 1 Starting with the definition 1 in. = 2.54 cm and the fact that there are
5280 feet in 1 mile, find the number of
a) kilometers (km) in 1 mile
(Ans: 1.609 km = 1 mile)
b) Feet in 1 km
(Ans: 3281.5 ft = 1 km)
Qu. 2 The wing area of a Cessna 172 Skyhawk measures 16.2 m2. Using the
conversion 1 in = 2.54 cm find how many square inches this is?
(Ans: 25,110 in2 )
Qu. 3 According to the label on a bottle of salad dressing, the volume of the
contents is 0.473 liter (L). Using only the conversions 1 L = 1000 cm3 and 1
in = 2.54 cm, express this volume in cubic inches (in3).
(Ans: 28.86 in3 )
Qu. 4 The usable fuel capacity of a Boeing 757 is 43,490 L. How many
gallons is this if 1 gallon = 3.788 L?
(Ans: 11,481 gallons)
Qu. 5 The Cruise speed of a Beoing 757 is 458 knots. Using the conversion
1 nautical mile (nm) = 6076 ft find how many meters/second this is.
(Ans: 235.6 m/s)
Qu. 6 The maximum wing loading permitted on a Cessna 172 Skyhawk is
68.9 kg/m2 Using the conversion 2.205 lbs = 1 kg find how many lbs per
square foot this is.
(Ans: 14.2 lbs/ft2 )