৩১৪৫১
If 12 carpenters, working 6 hours a day, can make 460 chairs in 24 days, how many chairs will 18 carpenters make in 36 days , each working 8 hours a day?
উত্তর
1380
৩১৪৫২
A tap can fill a tank in 6 hours. After half the tank is filled, there more similar taps are opened. What is the total time taken to fill the tank completely?
উত্তর
4 hrs
৩১৪৫৪
If a boat goes 7 km upstream in 42 minutes and the speed of the speed of the stream is 3 kmph, the speed of the boat in still water is
উত্তর
13 km/hr
৩১৪৫৫
In a row in the theatre the seats are numbered consecutively from T1 to T50. Sumon is sitting in seat T17 and Sajib is sitting in seat T39. How many seats are there between us?
উত্তর
21
৩১৪৫৭
Tea worth Tk. 165 per kg and Tk. 135 per Kg are mixed with a variety in the ratio 1: 1: 2. If the mixture is worth Tk. 153 kg, the price of the third variety per kg will be:
উত্তর
175.50
৩১৪৫৮
A train takes 18 seconds to pass completely through a station 162 m long and 15 seconds through another station 120 m long. The length of the train is-
উত্তর
90 m