Rice is now being sold at Taka 20 a kg. During last month its rate was Taka 16 per kg . By how much percent should a family reduce its consumption so as to keep the expenditure fixed?

Rice is now being sold at Taka 20 a kg. During last month its rate was Taka 16 per kg . By how much percent should a family reduce its consumption so as to keep the expenditure fixed? Correct Answer 20%

ধরি, L এবং T যথাক্রমে Last month এবং This month এর চালের পরিমাণ So, cost last month = 16L; this month = 20T যেহেতু cost একই রাখা হয়েছে,এই দুটি same so, 16L = 20T or, T = .8L অথাৎ This month তারা rice consume করবে, 8 times of last month or 80% So,reduction in consumption = (100 - 80)% = 20%
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