Q4 of 15 Page 137

Two quantities are in the ratio 3 : 5.

(i) If the smaller alone is made four times the original, what would the ratio be?


(ii) If the smaller is doubled and the larger is halved, what would the ratio be?

Let the two quantities be 3x and 5x

i). If the smaller alone is made four times the original


Smaller quantity = 3x


4 × 3x = 12x


New ratio


∴ New ratio is 12: 5


ii). If the smaller is doubled and the larger is halved


Smaller quantity = 3x and larger quantity = 5x



⇒


⇒


∴ New ratio is 12: 5


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