The difference between two numbers is 5 and the difference between their square is 65. What is the smaller number?
A plane traveling at 600 miles per hour is heading for Chittagong airport. At 3.58 pm it was 30 miles from the airport. At what time it will arrive at 600 at the airport?
4.01 pm
4.02 pm
4.18 pm
4.20 pm
What is the value of 2x+4-4.2x+12x+2+2=?
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?