If a : b = 2 : 3 a : b = 2 : 3 a : b = 2 : 3 and b : c = 5 : 7 b : c = 5 : 7 b : c = 5 : 7 , then find the ratio c : a c : a c : a .

SSC SSC CGL Tier 2 Easy Percentage MCQ

Question

If $a : b = 2 : 3$ and $b : c = 5 : 7$ , then find the ratio $c : a$ .

Options

A.

$15 : 21$

B.

$20 : 21$

C.

$21 : 10$

D.

$10 : 21$

ratioproportionlcmbasic arithmetic

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