১২৪৬১
The length of a rectangular plot is 3 folds its width. Half the area of the plot is covered by a playground whose area is 363 square meter. What is the length of the plot?
উত্তর
46.67m
১২৪৬২
A box contains 10 electric bulbs of which 2 bulbs are defective. Two bulbs are chosen at random. What is the probability that one of them is defective?
উত্তর
16/45
১২৪৬৩
Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours, C is closed and A and B can fill the remaining part in 6 hours. The number of hours taken by C alone to fill the tank is:
উত্তর
18 hours
১২৪৬৫
An employer pays 3 workers X, Y and Z a total of Tk. 36,600 a week. X is paid 125% of the amount Y is paid and 80% of the amount Z is paid. How much does X make a week?
উত্তর
12,000
১২৪৬৬
The volume of a rectangular solid is to be increased by 50% without altering its base. To what extent the height of the solid must be changed.
উত্তর
50%
১২৪৬৭
If (89)2 is added to the square of a number, the answer so obtained is 16202. What is the 1/26 of that number?
উত্তর
3.50
১২৪৬৮
What is the average (arithmetic mean) of all the multiple of tens from 10 to 190 inclusive?
উত্তর
100
১২৪৬৯
A man can hit a target once in 4 shots. If he fires 4 shots in succession, what is the probability that he will hit his target?
উত্তর
175/256