১১৫২২
The diameters of two circles are the side of a square and the diagonal of the square. The ratio of the area of the smaller circle and the larger circle is-
উত্তর
1 : 2
১১৫২৩
Two circles of equal radii touch externally at a point P. From a point T on the tangent at P, tangents TQ and TR are drawn to the circles with points of contact Q and R respectively. The relation of TQ and TR is-
উত্তর
TQ = TR
১১৫২৪
A person rides a bicycle round a circular path of radius 50m. The radius of the wheel of the bicycle in 50cm. The cycle comes to the starting point for the first time in 1 hour. What is the number of revolutions of the wheel in 15 minutes?
উত্তর
25
১১৫২৫
In covering a certain distance, the speed of A and B are in the ratio of 3 : 4. A takes 30 minutes more than B to reach the destination. The time taken by A to reach the destination is:
উত্তর
2.0 hours
১১৫২৬
Two lots of onions with equal quantity, one costing Tk.10 per kg and the other costing Tk.15 per kg. are mixed together and whole lot is sold at Tk.15 per kg. What is the profit or loss?
উত্তর
20% profit
১১৫২৭
A and B are partners in a business. A contributes 1/4 of the capital for 15 months and B receives 2/3 of the profit. Find for how long B's money was used.
উত্তর
10 months
১১৫২৮
If 6 men and 8 boys can do a piece of work in 10 days and 26 men and 48 boys can do the same in 2 days, the time taken by 15 men and 20 boys to do the same type of work will be-
উত্তর
4 days
১১৫২৯
Pipe A alone can fill a tank in 8 hours. Pipe B can fill it in 6 hours. If both the pipes are opened and after 2 hours pipe A is closed, then the other pipe will fill the tank in-
উত্তর
5/2 hours
১১৫৩০
A train of length 150m takes 10 seconds to cross another train 100m long coming from the opposite direction. If the speed of first train is 30 km/hr, what is the speed of second train ?
উত্তর
60 km/hr