১২৭১১
A room 8m long, 6m high and 22.5cm thick is made up of bricks, each measuring 25 cm × 11.25 cm × 6cm. The number of bricks required is.
উত্তর
6400
১২৭১২
If the salary of an employee is reduced by 10 percent for his late attendance and then increased by 10 percent on a pardon, how much does he loss?
উত্তর
1%
১২৭১৩
A train 240m long passes a pole in 24 seconds. How long will it take to pass a platform 650m long?
উত্তর
89 sec
১২৭১৪
Out of 10 persons working on a project, 4 are graduates. If 3 are selected, what is the probability that there is at least one graduates among them?
উত্তর
5/6
১২৭১৬
A cricketer has a certain average for 9 innings. In the 10th innings he scores 100 runs, thus increasing his average by 8 runs. What is new average?
উত্তর
28
১২৭১৭
The average of 20, 70 and x is 40. If the average of 20, 70, x and y is 50, then y = ?
উত্তর
80
১২৭১৮
What is the total interest on Tk. 800 at 12.5% per annum for 9 months in Taka?
উত্তর
75
১২৭২০
In a mixture of 30 liters, the ratio of acid and water is 7: 3. How much more water is to be added to get a new mixture containing acid and water in the ratio of 3 : 7?
উত্তর
40 liters