Rice price reduced by 10%, a man buys 4 kg more for Rs. 144. Reduced price per kg is: MCQ with Answer and Explanation

Explanation:
New price 1.5, multiplier needed = 1/1.5 = 2/3, reduction = 1 - 2/3 = 33.33%.

Explanation:
Original x, xy=60. 0.8x(y+2)=60 → 48 + 1.6x =60 → 1.6x=12 → x=7.5? Wait: 0.8x(y+2)=0.8xy + 1.6x =0.8*60 + 1.6x =48+1.6x=60 → 1.6x=12 → x=7.5, not 6. So if x=7.5, original price 7.5, reduced 6. So reduced price 6. So I'll ask reduced price: 6. Or ask original 7.5. Options given: 5,6,7.5,8. So correct answer 7.5. So original price Rs.7.5.

Explanation:
0.4F + S = 1.2S → 0.4F = 0.2S → F/S = 0.2/0.4 = 1/2.