১২৯৬১
A tank has two leakages. The first leakage alone can empty the tank in 9 minutes and the second alone would have done it in 6 minutes. If water leaks out at a constant rate, how long does it take both the leakage together to empty the tank?
উত্তর
3.6 min
১২৯৬২
Worker P is 50% as efficient as worker Q. Worker R does half of the work done by P and Q together. If R alone does the work in 40 days, then P, Q and R together can do the work in -
উত্তর
13(1/3) days
১২৯৬৩
The sum of the circumference of a circle and the perimeter of a rectangle is 130 cm. The area of the rectangle is 104 cm2 and the length of the rectangle is 13 cm. What is the area of the circle?
উত্তর
616 cm 2
১২৯৬৪
A box is made in the form of a cube. If a second cubical box has inside dimensions three times those of the first box, how many times as much does the second box contain?
উত্তর
27
১২৯৬৫
One filling pipe P is three times faster than another filling pipe Q, if P can fill tank in 24 hours, then what is the time taken to completely fill the tank if both the pipes are opened together?
উত্তর
18 hours
১২৯৬৬
A box contains 4 tennis ball, 6 season and 8 dues balls. 3 balls are randomly drawn from the box. What is the probability that the balls are different?
উত্তর
4/17
১২৯৬৭
On dividing an individual number by 342, we get 47 as remainder. If the same number is divided by 18, what will be the remainder?
উত্তর
11
১২৯৬৮
Rahim and Karim donated Tk. 100 each in charity. Karim gives each Tk. 1 more than Rahim and Rahim distributes money to 5 more people than Karim. How many people are there in this charity?
উত্তর
45
১২৯৬৯
A square is inscribed in a circle of diameter 2a and another square is a circumscribing circle. The difference between the areas of outer and inner squares is -
উত্তর
2a 2
১২৯৭০
The income of ‘A’ is 20% higher than that of ‘B’. The income of ‘B’ is 25% less than of ‘C’. What percent less is A’s income from C’s income?
উত্তর
10%