Question

find the c.p. when s.p. = ₹ 12 ; gain =20%

Answer 1

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CP = SPx 100/(100+ profit%)
$= \frac{12 \times 100}{100 + 20} \\ = \frac{1200}{120} \\ = 10$
So CP ₹ 10 Answer

Hope it helps you

Answer 2

Given :

SP = Rs. 12

Gain % = 20 %

CP = ?

Solution :

SP = (100 + Gain %) / 100 X CP

Rs. 12  = (100 + 20) / 100 X CP

Rs. 12 = 120 / 100 X CP

After Simplification,

Rs. 12 = 6 / 5 X CP

6CP = Rs.12 X 5

6CP = Rs.60

CP = Rs. 60 / 6

CP = Rs.10

Therefore , CP is Rs.10

HOPE YOU UNDERSTOOD

S. Harish Abhimanyu