Solve the following problems:

The price of 3 horses is same as the cost of 5 cows. If total cost of 4 horses and 6 cows is Tk 1900, find the cost of one horse.

Mathematics

40% of the students of a class failed in statistics and 35% of students failed in computer studies. If the class size is 200 and 70 students failed in neither of the subjects, then how many students failed in both the subjects?

Mathematics

The ratio between the length and the breadth of a rectangular park is 3 : 2. If a man cycling along the boundary of the park at the speed of 12km/hour completes one round in 8 minutes, then what is the area of the park in square meters?

Mathematics

$if \frac{x^2-7x+12}{x^2+4}=3$, calculate the value of x.

Answer the following mathematical problems:

What is the minimum number of oranges that must be added to the existing stock of 264 oranges so that the total stock can be equally distributed among 6, 7 or 8 persons?

Answer the following mathematical problems:

Bokul invested an amount of Tk. 15,000 in fixed deposit scheme for 3 years at interest rate 5% per annul. How much amount will she get on maturity of the fixed deposit if the interest is compounded quarterly?