P and Q start a business with initial corresponding profits are in the 13:8. Their corresponding proffits are in the ratio of 7:5. If P invested his money for 7 months, find the time period for invested his money .
compound interest on a certain sum for 2 years at 10% per annum is tk.420. what wouls be the simple interest at the same rate and for the same time ?
Ravi leaves home for studium which is 12 km from his house . After the stadium , he goes to ____ which is 7 km from his house , stusium and club all fail in a time, them what is the minimum distance he has to travel to get back home ?
If a man cycles at 10 km/hr , then he arrives at a certain place at 1 pm . If he cycles at 15km/hr, arrive at the same place at 11am . At what speed must he cycels to get there at noon ?
three meauring rods are 64 cm, 80 cm and 96 cm in length, What is the least length of cloth that can be measured exact number of times using any one of these rods ?
A tank can be filled by a tap in 20 minutes and by another tap in 60 minutes . Both the taps are kept open for 10 minutes and then the first tap is shut off. After this , the tank will be completely filled in what time ?
a box contains 20 electric bulbs , out of which 4 are defective . 2 bulbs are chosen at random from this box . The probability that at least one of these is defective is
There is a rectanguler parking lot with a length of 2x and a width of x. What is the ratio of the perimetr of the parking lot of the rea of the parking lot to the area of the parking lot,
The ratio of income of a to that of B is 7:5 and the expenditure of A to that of B is 3:2. If , at the end of the year , each saves tk.500, find the income of A.
An empty backet being filled with paint at a constant rate takes 6 min to be filled to 7/10 of its capacity . How much more time will it take to fill the bucket to full capacity ?
In distributing milk at a summer camp it is found that a quart of milk will fill either 3 large glass tumblers. How many small glass tumblers can be filled with one large glass tumbler ?
a bank offers 5% interst compounded half yearly . A customer deposit tk.1600 each on 1st july of a year . At the end of the year , the amount he would have gained by the way of interest is :
a box is made in the form of a cube. IF a second cubical box has inside first box , how many times as much does the second box contain ?
A can do a job in 24 days . B in 9 days and C in 12 days . B and C together start the work but leave after 3 days . How many days was taken by A to complete the remaining work ?
In a group of 15, 7 can speak spanish , 8 can speak French and 3 can speak neither . What function of the group can speak both Franch and spanish ?
A , B and C enter into partnership by making investments in the ratio 3:5:7 . after a year , C invests another tk.337600 while a withdraws tk. 45600, the ratio of investments then changes to 24:59:87 . How much does a invest initially ?
A rectanguler fish tank 25m by 9m has water in it to a lavel of 2m . This cylindrical container with a diameter of 10m . How high will the water reach in the cilindrycal container ?
At a symposium , 20 % of the professors are psychologists , 60% are biologists , and the remaining 12 professors are economists . If 20 of the professors were glasses , what present of the professors do not wear glasses ?
karim has 40% more stamps than rahim . If he gives 45 of his stamps to Rahim will have 10% more stamps than karim . How many stamps did karim begin with ?
A clock strikes once at 1 O'clock, twice at 2 O'clock twice at 2 O'clock, thrice at 3 O'clock and so on. How many times will it strike in 24 hours
The primeter of a rectangle is 26 cm. The rectangle is 26 cm. The rectangle is coverted to a square by tripling the width and talking a quarter of the length
In an examination, 34% of the students failed in mathematics and 42% failed in English. If 20% of the student failed in both the subjects, them find the percentage of students who passed in both the subjects.
125 gallon of a mixture contain 20% water. What amount of additional water should be added such that water content is raised to 25%?
At a symposium 20% of the professors are psychologist, 60% are biologist and the remaining 12 professors are economist. If 20 of the professors wear glasses, what percent of the professors do not glasses?
In a department 3/5 of the workers are men and the rest women. If 1/2 of the men and 3/7 of the women in the department are over 35, what fraction of all the worker in the department are over 35?
The ratio of investments of two partners P and Q is 7: 5 and ratio of thier profits is 7: 10. If P invested the money for months, find for how time did Q invest the money .