Mariam is setting up a factory to manufacture tennis balls. If she buys a machine that costs BDT49750, then she can manufacture a tennis ball for BDT22.2. On the other hand, if she buys a machine that costs BDT43000, she can manufacture a tennis ball for BDT23.7. How many tennis ball should she manufacture, so that the total cost is the same no matter which machine she buys?
One ticket to a show costs BDT100. Jameel buys a total of 6 tickets for the show using a coupon that gives him a 20% discount. Mehek buys 8 tickets, using a coupon that gives a 30% discount. How much more did Mehek pay than Jameel?
By selling a mat for ^@BDT 3360^@, Sahir loses ^@10\%^@. For how much should he sell it to gain ^@20\%^@. (Round off the calculations to ^@ 2 ^@ decimal places.)