২৬২৮১
A certain river has a current of 4 miles per hour.A boat takes twice as long to travel upstream between two points as it does to travel downstream between the same two points. What is the speed of the boat in still water?
উত্তর
12 miles per hour
২৬২৮২
Alam sold an item for Tk. 6,384 and incurred a loss of 30%. At what price should he have sold the item to have gained a profit of 30%?
উত্তর
Tk. 11,856
২৬২৮৪
If 4 years' interest of Principal tk.500 and 5 years interest of Principal Tk. 600 are Tk. 500 in total , what is the rate of interest?
উত্তর
10%
২৬২৮৫
Kiran purchased a scooter for Tk. 52000. He sold it at loss of 10%.With that money be purchased another scooter and sold it at profit of 20% What is his overall loss/ profit?
উত্তর
Tk. 4160 profit
২৬২৮৭
In the figure below, a square is inscribed in a circle with diameter d. What is the sum of the areas of the shaded regions in terms of d?
উত্তর
d2(π4-12)
২৬২৮৮
A square is inscribed in a circle of diameter 2a and another square is circumscribing circle. The difference between the areas of outer and inner squares is__
উত্তর
2a2
২৬২৮৯
The area of a square on a straight line is how many times that on its one- third?
উত্তর
9