Question

what are the values of ad: bc and a+c : b+d ? if a:b = c:d = 2.5:1.5

Answer 1

a:b=c:d=2.5:1.5
=5. : 3(cancelling with 0.5)
we know that(W.KT)
a:b = c:d
$\frac{a}{b} = \frac{c}{d} \\ ad = bc \\ \frac{ad}{bc} = \frac{1}{1}$
so, ad:bc = 1

$\frac{a}{b} = \frac{c}{d} = \frac{5}{3}$
let a =5x
b = 3x
c = 5y
d= 3y
$\frac{a + c}{b + d} = \frac{(5x) + (5y)}{(3x) + (3y)} \\ \frac{5x + 5y}{3x + 3y} = \frac{5(x +y )}{3(x + y)} \\ = \frac{5}{3}$
so a+c : b+d = 5:3

Answer 2

Answer:

Step-by-step explanation: