10. The missing conversion is 20.32 inches
11. Total number of red cars is 34
12. Total number of blue cars is 36
13. Total number of silver cars is 70
What is Ratio?
Ratio is the number of times a quantity is contained more or less than another in a whole.
Analysis:
10. If 1 inch = 2.54cm
Then 8 inches = 8 x 2.54cm = 20.32 cm
First car park: Total number of cars = 60
ratio of red:blue:silver = 1:2:3
Total ratio = 1+2+3 = 6
number of red cars = 1/6 x 60 = 10
number of blue cars = 2/6 x 60 = 20 cars
number of silver cars = 3/6 x 60 = 30
second car park: Total number of cars = 80
ratio of blue: red: silver = 2:3:5
total ratio = 2+3+5 = 10
number of red cars = 3/10 x 80 = 24
number of blue cars = 2/10 x 80 = 16
number of silver cars = 5/10 x 80 = 40
11. Total number of red cars = 10+24 = 34
12. Total number of blue cars = 20+16 = 36
13. Total number of silver cars = 30+40 = 70
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