Area = 100 ft² Area = l × w Since you know it is a square than the sides are all equal. So the length and width are the same measurement. What two numbers when multiplied together equals 100? In order to find the answer you could do the square root of 100 which would give you 10. So you know that each side is 10 feet. Using that you multiply 10 by 4because there are 4 sides in a square to get 40. This means that she will need 40 feet of fencing to enclose the garden. Answer: 40 feet
The speed of the first train is 45 mph and the speed of the second train is 75 mph
Step-by-step explanation:
Let x represent the speed of the first train in mph. Since the second train, is 30 mph faster then the first, therefore the speed of the second train is (x + 30).
The first train leaves at 1:00 pm, therefore at 6:00 pm, the time taken is 5 hours. Therefore the distance covered by the first train at 6:00 pm = x mph * 5 hours = 5x miles
The second train leaves at 3:00 pm, therefore at 6:00 pm, the time taken is 3 hours. Therefore the distance covered by the second train at 6:00 pm = (x + 30) mph * 3 hours = (3x + 90) miles
Since the second train overtakes the first at 6:00 pm, hence:
3x + 90 = 5x
2x = 90
x = 45
Therefore the speed of the first train is 45 mph and the speed of the second train is 75 mph (45 mph + 30 mph).
