৫৮৭১
There is 60% increase in an amount in 6 years at simple interest. What will be the compound interest of Tk. 12,000 after 3 years at the same rate?
উত্তর
Tk. 3972
৫৮৭৩
A room 5m × 8m is to be carpeted leaving a margin of 10 cm from each wall. If the cost of the carpet is Tk. 18 per sq. meter, the cost of carpeting the room will be :
উত্তর
Tk. 673.92
৫৮৭৪
A motorboat, whose speed is 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is :
উত্তর
5 km/hr
৫৮৭৫
3 pumps working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?
উত্তর
12
৫৮৭৮
The hypotenuse of a right triangle is 2 centimeters more than the longer side of the triangle. The shorter side of the triangle is 7 centimeters less than the longer side. Find the length of the hypotenuse.
উত্তর
17 cm
৫৮৭৯
A car owner buys petrol at Tk.17. TK. 19 and TK. 20 per liter for three consecutive years. Compute the average cost per liter. If he spends Tk. 6460 per year.
উত্তর
Tk. 18.58