৫৬৬১
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
৫৬৬২
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
৫৬৬৩
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
৫৬৬৪
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)
৫৬৬৫
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
৫৬৬৬
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
৫৬৬৭
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