The perimeter of a triangle is divisible by 6. Suppose the length of two sides of the triangle are 4cm and 8cm, find the third length of the triangle.​

Three cylinders have a volume of 2836 cm^3. cylinder a has a height of 900 cm. cylinder b has a height of 225 cm. cylinder c has a height of 100 cm. find the radius of each cylinder. use 3.14 as an approximate for π

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?