In a collection of green, red, and black marbles, there are 35% more green marbles than red marbles, and there are 60% more black marbles than green marbles. If A is the number of green marbles, what is the total number of marbles?
Ahmed bought the following things when he got his first salary: A camera for SR 2355.05 A microwave for SR 6397.15 A computer for SR 17429.40 If his salary was SR 70000, what does he have left after all the shopping?
A square park has an area of 2025 sq. m. It has to be fenced. The fencing will require use of a wire that must be able to enclose the park 4 times, and each circuit of the wire would be 2 % greater than the perimeter of the park. What is the length of wire (in metres) needed for this?