When the price of sugar decreases by 10%, a man could buy 1 kg more for Rs.270. Then the original price of sugar per kg is
Options:
A . Rs.25
B . Rs.27
C . Rs.32
D . Rs.30
Answer: Option D Answer: (d) Let the original price of sugar be Rs.x/kg. New price = Rs.${9x}/10$ /kg $270/{{9x}/10} - 270/x =1$ $300/x - 270/x = 1 ⇒ 30/x = 1$ ⇒ x = Rs.30 /kg Using Rule 31, New price = ${10 × 270}/{100 × 1}$ = Rs.27 Let the original price be Rs. x $x - {10x}/100 = 27 ⇒ {90x}/100 = 27$ $x = 2700/90$ ⇒ x = 30 ∴ Original price = Rs.30 per kg.
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