Answer :

By counting the number of squares under each continent we can get to know the areas as follows


Africa = 26 sq. units


Europe = 10 sq. units


Australia = 8 sq. units


Asia = 44 sq. units


Antarctica = 13 sq. units


North America = 17 sq. units


South America = 18 sq. units


(a) ratio of area of Africa to Europe = =


Divide numerator and denominator by 2 we get


ratio of area of Africa to Europe = = 13:5


(b) ratio of area of Australia to Asia = =


Divide numerator and denominator by 4 we get


ratio of area of Australia to Asia = = 2:11


(c) ratio of area of Antarctica to combined area of North America and South America = = = = 13:35


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