RRB RPF RPSF SI and CONS Model Papers 4 with solutions

(4) M.P = ₹ 30
S.P. = M.P. – Discount
S.P. = 30. – 20% of 30
= ₹ 30 – 6
=₹ 24
Gain% = 30%
Let cost of the item = C
According to the question,
C + 30% of C = S.P
1.3 C = 24
C = ₹ 18.46