Question 41

The third proportional of two numbers 12 and 48 is

Solution

Three numbers a,b,c are in proportion iff $$b^2 = ac$$

Here, a = 12 and b = 48

=> $$(48)^2 = 12 \times c$$

=> $$c = \frac{48 \times 48}{12} = 4 \times 48$$

=> $$c = 192$$

=> Ans - (C)


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