১১০৩১
A man takes twice as long to row a distance against the stream as to row the same distance in favour of the stream. The ratio of the speed of the boat (in still water) and the stream is:
উত্তর
3 : 1
১১০৩২
A, B and C investment in a partnership in the ratio of 5 : 6 : 8. The ratio of their profit is 5 : 3 : 12. Find the ratio of time for their investment?
উত্তর
2 : 1 : 3
১১০৩৫
How many litres of a 90% of concentrated acid needs to be mixed with a 75%. Solution of concentrated acid to get a 30 liter solution of 78% concentrated acid?
উত্তর
6
১১০৩৬
The difference between the compound interest and the simple interest on a certain sum at 5% per annum for 2 years is Tk. 1.50. The sum is?
উত্তর
Tk. 600
১১০৩৭
Two cards are drawn together from a pack of 52 cards. The probability that one is a spade and one is a heart, is:
উত্তর
13/102
১১০৩৮
In a lottery, there are 10 prizes and 25 blanks. A lottery is drawn at random. What is the probability of getting a prize?
উত্তর
2/7
১১০৩৯
A rectangular block 6 cm by 12 cm by 15 cm is cut up into an exact number of equal cubes. Find the least possible number of cubes.
উত্তর
40
১১০৪০
The ratio between the perimeter and the breadth of a rectangle 5 : 1. If the area of the rectangle is 216 sq.cm, what is the length of the rectangle?
উত্তর
18cm