Help me find the value of X

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Jane’s favorite fruit punch consists of pear, pineapple, and plum juices in the ratio 5: 2: 3. how many cups of pear juice should she use to make 20 cups of punch?

Arectangle has a perimeter of 24 inches. if the width is 5 more than twice the length, what are the dimensions of the rectangle?