Question

# در ادا 2 = c , a (a + b) : b 5 (b + c) = ? (1) 3:4 (2) 5 :9 (3) 4:5 (4) 20 : 27

Solution

48. (4) a: b=2:3
b: c=4:5
.. :b:c= 2 x 4:3 x 4:3 x 5
= 8:12:15
a +b 8+12 20
*b+c 12 + 15 27
Solution

48. (4) a: b=2:3
b: c=4:5
.. :b:c= 2 x 4:3 x 4:3 x 5
= 8:12:15
a +b 8+12 20
*b+c 12 + 15 27