১২১২১
A boat takes 4 hours to cover a certain distance running downstream, while running upstream it requires 8 hours 48 minutes to cover the same distance. Find the ratio between the speed of the current and the speed of the boat?
উত্তর
3 : 8
১২১২২
Lubana purchases 20kg of pulses at a rate of Tk. 14.25 per kg and 30kg of pulses at a rate of Tk. 11.50 per kg. She decided to mix the two and sold the mixture. To make a profit of 30%, what price per kg should he sell the mixture?
উত্তর
16.38
১২১২৩
Rahim invested in all Tk. 2,600 in three different schemes at 8%, 4% and 6% per annum simple interest. At the end of the year, he received the same interest in all the three schemes. What is the money invested in scheme having 4% rate of interest?
উত্তর
Tk. 1,200
১২১২৪
Shonghoti and Shouhardo Clubs consist of 200 and 270 members respectively. If the total member of the two clubs is 420 then how many members belong to both clubs?
উত্তর
50
১২১২৬
The area of a rhombus is 96 sq.cm and the length of one of the diagonals is 16cm. The length of the other diagonal is
উত্তর
12
১২১২৭
The ratio of two numbers is 3 : 4 and their sum is 630. The smaller one of the two numbers is
উত্তর
270
১২১২৯
What will be the difference in taka between simple and compound interest at 10% on a sum of Tk. 1,000 after 4 years?
উত্তর
64.10
১২১৩০
In a series of 6 consecutive odd numbers if 15 is the 6th number, what is the 4th number in the series?
উত্তর
11