Which shows a fractional and decimal equivalent of 9/20 ?
2 answers:
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1. Consider the pyramid ABCDE in the figure 1 attached:
Each side of the square base equals (units)
Area of 1 lateral side of pyramid ABCDE is
so the total lateral area is (units squared)
and the total surface area is (units squared)
2. Now consider the second figure KLMNP, Sydney's pyramid:
The lateral area is
so the total area of the second pyramid is
So 2 things can be said about the areas:
i) the lateral area of Sydney's pyramid is times larger than the lateral area of the original pyramid.
ii) The total area of Sydney's pyramid is units squared larger than the total area of the original pyramid.
Answer:
300
Step-by-step explanation:
3 : 15 :: 60 : x
Product of extremes = Product of means
3 * x = 15 * 60
Or Do in this way
x = 15* 20 = 300