The ratio of two numbers is 3 : 7. If their product is 1344, then what is the sum of both the numbers?
Let the numbers be $$3x$$ and $$7x$$
Product = $$(3x)\times(7x)=1344$$
=> $$x^2=\frac{1344}{21}=64$$
=> $$x=\sqrt{64}=8$$
$$\therefore$$ Sum of numbers = $$3x+7x=10x$$
= $$10\times8=80$$
=> Ans - (A)
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