Question

2.
If a : b = 8:9, b: c = 18:40, then a : c is
(2) 5 : 2 (3) 2 : 5
(3) 2 : 5 (4) None
(1) 1 : 5
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Answer 1

(3).2:5

is the answer

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Answer 2

Answer:

2:5

Step-by-step explanation:

if a/b=8/9

then b = 9a/8 eq.(i)

if b/c=18/40

then b = 18c/40 eq.(ii)

9a/8 = 18c/40

=》a/c = 2/5

a:c=2:5