Question

both P and Q vary directly with each other. When P is 10 and q is 15, which of the following is not a possible pair of corresponding values of P and Q? option = (i) 15 and 20 (ii) 20 and 30 (iii) 2 and 3 (iv) 5 and 7.5​

Answer 1

Answer:

15 and 20 is not possible pair

option (i) is correct

Step-by-step explanation:

since P and Q are directly vary with each other,

P = kQ where k is a constant

when P=10, Q=15

⇒ 10=k(15)

⇒ k= 10/15

⇒ k= 2/3

$\therefore\:P=\frac{2}{3}Q$

when Q=20

$P=\frac{2}{3}(20)$

$P=\frac{40}{3}$

when Q=30

$P=\frac{2}{3}(30)$

$P=20$

when Q=3

$P=\frac{2}{3}(3)$

$P=2$

when Q=7.5

$P=\frac{2}{3}(7.5)$

$P=5$

⇒ 15 and 20 is not possible pair

Answer 2

Answer:

15 and 20 are not a possible pair.