৩১৭১৩
A monkey climbs a 60 m high pole.s In first minute he climbs 6 m and slips down 3 m in the next minute. How much time is required by it to reach the top?
উত্তর
37 minutes
৩১৭১৪
Two trains 105 meters and 90 meters long, run at the speeds of 45 km/h and 72 km/h respectively , in opposite directions on parallel tracks. The time which they take to cross each other , is:
উত্তর
6 seconds
৩১৭১৫
The speed of a boat in still water in 15 km/hr and the rate of current is 3 km/hr. The distance traveled downstream in 12 minutes is
উত্তর
3.6 km
৩১৭১৬
A bag contains 2 red, 3 green and 2 blue balls.Two balls are drawn at random. What is the probability that none of the balls drawn is blue?
উত্তর
10/21
৩১৭১৭
The length of a rectangular plot is 20 meters more than its breadth. If the cost of fencing the plot at TK. 26.50 per meter is TK. 5300, what is the length of the plot in meters?
উত্তর
100
৩১৭১৮
Find the least number of five digits which when divided by 40, 60, and 75 , leave remainders 31 ,51 and 66 respectively.
উত্তর
10191
৩১৭১৯
A tank is filled in 5 hours by three pipes A,B and C The pipe C is twice as fast as B and B is twice as fast as A How much time will pipe A alone take to fill the tank?
উত্তর
35 hours
৩১৭২০
What is the amount of equal installment , if a sum of TK. 1428 due 2 years hence has to be completely has to be completely repaid in 2 equal annual installments starting next year?
উত্তর
cannot be determined