৬৪ কে ৭:৮ অনুপাতে হ্রাস করলে নতুন সংখ্যা হবে?
A salesman's commission is 5% on all sales up to Tk. 10,000 and 4% of all sales exceeding this amount. He remits Tk. 31,100 to the parent company after deducting his commission. His sales were worth:
If a man reduces the selling price of a fan from Tk. 400 to Tk. 380, his loss increases by 2%. The cost price of the fan is: