SSC CGL Tier II 12 Apr 2015 Paper

Question : 81 of 100

Marks: +1, -0

Pooja wants to sell a watch at a profit of 20%. She bought it at 10% less and sold it at ₹ 30 less, but still she gained 20%. The cost price of watch is

₹ 240
₹ 220
₹ 250
₹ 225

Validate

Solution:

(3) C.P. of watch = Rs. x (let)

∴

S.P.

= {120 x}/{100}=

Rs.

{6 x}/{5}

Case II,
C.P.

=

Rs.

{9 x}/{10}

S.P.

=

Rs.

\ {6 x}/{5}-30 )

According to the question,

{6 x}/{5}-30=\ {9 x}/{10} ×{120}/{100}= {27 x}/{25}

⇒{6 x}/{5}- {27 x}/{25}=30

⇒{30 x-27 x}/{25}=30

⇒3 x=30 ×25

⇒ x= {30× 25}/{3}=

Rs. 250

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