3 pumps working 8 hours a day can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?
If one-third of one-fourth of a number is 15, then three-tenth of that number is:
০.০১ × ০.০০১ × ০.০০০১ × ০ = কত?
০.০০০০০০১
০.০০০০০১
0
কোনটিই নয়
A shopkeeper suffers a loss of 20% upon selling a shirt for Tk 4000. If he wants to make 15% profit after giving an 8% discount on the marked price, what is the marked price of the shirt, in Tk.?
একটি সংখ্যা ৩০১ হতে যত বড় ৩৮১ হতে তত ছোট। সংখ্যাটি কত?