Question 88
Two numbers are such that the ratio between them is 3:5. If each is increased by 10, the ratio between them becomes 5:7. What is the difference between the two numbers?
Solution
Let the numbers be $$3x$$ and $$5x$$
According to question,
=> $$\frac{3x+10}{5x+10}=\frac{5}{7}$$
=> $$21x+70=25x+50$$
=> $$4x=20$$
=> $$x=\frac{20}{4}=5$$
$$\therefore$$ Difference = $$2x=2\times5=10$$
=> Ans - (B)
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