Question

if a:b=4:5 find 10a+5b/10a-5b​

Answer 1

Answer:

$\frac{a}{b} = \frac{4}{5}$

let, a= 4k

b = 5k

$\frac{10a + 5b}{10a - 5b} = \frac{40k + 25k}{40k - 25k} = \frac{65k}{15k} = \frac{65}{15} = \frac{13}{3} = 4 \frac{1}{3}$

Answer 2

(10×4+5×5)÷(10×4−5×5)

(40+25)÷(40−25)

65÷15

4.3