If SP is Rs. 54 after a 10% discount, it means Rs. 54 is 90% of MP:
MP = Rs. 54 / 0.9 = Rs. 60.
SP = (CP × 150%) = 1.5 × CP
1.5 × CP = Rs. 54 (one article), therefore CP = Rs. 54 / 1.5 = Rs. 36.
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A television is sold for Rs.44,000 at a profit of 10%. What is the cost price?