Mathematics

If the length of the two sides of a trapezoid are 4cm and 7cm and height of the trapezoid is 7cm, calculate the area of the trapezoid.

Solve the following problems:

A man won a lottery of Tk.20,00,000. He gave 2/5 of the amount to his wife and 1/4 of the balance to his son. He donated 2/9 of the balance amount. How much money was donated?

Solve the following problems:

Reena took loan of Tk 1200 at simple interest rate for as many years as the rate of interest. If she paid Tk.432 as interest at the end of the loan period, what is the rate of interest?

Solve the following problems:

A square and an equilateral triangle have equal perimeters. If the diagonal of the square is 12√2 cm, then what is the area of the triangle?

Mathematics

What is the value of $\frac{2^{x+4}-{4.2}^{x+1}}{2^{x+2}+2}=?$

Mathematics

A pipe can fill up an empty tank in 15 minutes. Another pipe flows out 20 liter of water per minute. If the two pipes are opened together and the empty tank is filled in 135 minutes, how much water does the tank contain?