Math
Exercise 1
Note: None of the options is exactly correct. Choose the option that is closest to the correct answer.
1. Convert 25.5 oz. to grams
(a) 1
(b) 7
(c) 72
(d) 722
(d) 722
1oz. = 28.349 gr. -> multiplied by 25.5: 722.8995
grams
2. Convert 12 quarts to liters
(a) 8
(b) 10
(c) 13
(d) 15
(c) 13
1 quart = 1.14 litre -> multiplied by 12 = 13.68 litres
3. Convert 12 quarts to ccs (cm3)
(a) 10
(b) 1,000
(c) 10,000
(d) 14,000
(d) 14,000
litre = 1 dm3 = (10 cm)3 =1000 cm3, so we have
4. Convert 60 miles/hour to km/hour
(a) 70
(b) 90
(c) 96
(d) 110
(c) 96
1 mile = 1,609 km.
5. Convert 9.80 m/s to feet/s
(a) 3
(b) 25
(c) 32
(d) 40
(c) 32
1 foot = 0.305 m, so 3.279 feet = 1 m
9.80 m/s x 3.279 ft/s = 32.13 ft/s
or 9.80 m/s = 9.80 x 3.279 ft/s = 32.13 ft/s
6. Convert 8 in2 to cm2
(a) 1
(b) 10
(c) 30
(d) 52
(d) 52
1 inch2 = 6.452 cm2
8 inch2 = 8 x 6.452 cm2 = 51.616 cm2
7. Convert 60 miles/hour to m/sec
(a) 5
(b) 10
(c) 27
(d) 300
(c) 27
1 mile = 1609 m, so 60 miles = 96540 m.
1 hr= 3600 sec
60 miles/hr = 96540 m/ 3600 sec = 26.8 m/sec
8. Convert 15 lbs/in2 to kg/cm2
(a) 1
(b) 5
(c) 10
(d) 50
(a) 1
1lbs=0.454 kg, so 15 lbs = 6.803 kg.
1 inch2 is 6.452 cm2, so 15 lbs/in2 = 6.803 kg/6.452 cm2
9. Convert 32 feet /sec2 to cm/min2
(a) 1
(b) 7600
(c) 760,000
(d) 7,600,000
(b) 7600
1 foot = 30.5 cm and 1 sec2 = (1/60)2 min2, use same procedure as in 8
