SSC CHSL 6 Aug 2021 Shift 1 Paper

Section: Quantitative Aptitude

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Question : 58 of 100

Marks: +1, -0

If

a: b=5: 7, b: c=8: 15

, then find the value of

8 c: 5 a

.

$24: 5$
$21: 5$
$176: 65$
$8: 21$

Solution:

Given,

a: b=5: 7, b: c=8: 15

∴ \;\; a: b: c=5 × 8: 7 × 8: 7 × 15

=40: 56: 105

Let

a, b

and

c

be

40 x, 56 x

and

105 x

, respectively.

∴ \;\; 8 c: 5 a

\;\; =8 × 105 x: 5 × 40 x=21: 5

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