Question

(iv) 87 to 450 ml
5&tn600
(ii) 15,5,50,20
whofthe following numbers are in proportion?
(ii) 18,15,12,10
fuif the following numbers are in proportion:
(iv) 90,60,30,20​

Answer 1

Answer:

(i) 32, 40, 48 and 60 are in proportion

If 32:40 = 48:60

If 32 x 60 = 40 x 48

\left\{\frac{a}{b}=\frac{c}{d}\ \Rightarrow\ ad=bc\right\}{

b

a

=

d

c

⇒ ad=bc}

If 1920 = 1920

Which is true.

32, 40, 48 and 60 are in proportion.

(ii) 12, 15, 18 and 20 are in proportion

If 12:15 = 18:20

If 12 x 20 = 15 x 18 {ad = bc}

If 240 = 270

Which is not true

12, 15, 18 and 20 are not in proportion.