১২৯৭২
125 gallons of a mixture contains 20% water. What amount of additional water should be added such that water content be raised to 25%?
উত্তর
8(1/3) gallons
১২৯৭৩
The sum of squares of two numbers is 80 and the square of difference between the two numbers is 36. Find the product of two numbers
উত্তর
22
১২৯৭৪
There are two stations of length 162 meters and 120 meter respectively. A train takes 18 seconds to pass first station and 15 seconds to pass another station. Determine the length of the train.
উত্তর
90 m
১২৯৭৫
A man rows a certain distance along the stream and against the stream in 1 hour and 1.5 hours respectively. If the velocity of the current is 3 km/hr, what is the speed of the man in still water?
উত্তর
15 km/hr
১২৯৭৬
A milkman pays Tk. 6.40 per liter of milk. He adds water and sells the mixture at Tk. 8 per liter. By doing this, he makes 37.5% profit. Find the proportion of water to milk received by the customer.
উত্তর
1 : 10
১২৯৭৭
A leading library charges c cents for the first week that a book is loaned and f cents for each day over one week. What is the cost for taking out a book for d days, where d is greater than 7.
উত্তর
c + f(d - 7)
১২৯৭৮
Find the compound interest at the rate of 10% per annum for four years on the principal which in four years at the rate of 4% per annum gives Tk. 1600 as simple interest.
উত্তর
Tk. 4641
১২৯৭৯
A wheel rotates 10 times per minute and moves 20 m during each rotation. How many meters does the wheel move in 1 hour?
উত্তর
12000
১২৯৮০
An amount of Tk. 366 is to be divided among P, Q and R in such a manner that Q gets two-third as much as P and R together, and P may get half as much as Q and R together. What is the share of P?
উত্তর
122