SSC MTS Model Paper 4

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Question : 31 of 150

Marks: +1, -0

At what rate of simple interest per annum will a sum become

7/4

of itself in 4 years?

18%
18 $1/4$ %
18 $3/4$ %
18 $1/2$ %

Solution:

Let the principal be x

\therefore

Principal

{ SI } = { 7 { x } } /{ 4 }

∴ { SI } = { 7 { x } } /{ 4 } - { x } = { 3 { x } } /{ 4 }

Rate

= { { SI } × 100 } /{ { Principal } × { Time } }

= { 3 { x } × 100 } /{ 4× { x } × 4 } = 18 { 3 } /{ 4 } \%

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