A pipe has an outer radius of 4 1/2 cm. If the metal is 1/4 cm thick, what is the inner diameter of the pipe?

Please help me!!!

You not you just subtract from the or the wall thickenss, then double it to get the id?

Draw two concentric circles and see if this is so.

Sorry, your wrong. The correct procedure is to subtract only.

To help me solve question

Potangina

To find the inner diameter of the pipe, you need to subtract the thickness of the metal from the outer radius of the pipe. Here's how you can calculate it:

1. Start with the outer radius of the pipe, which is given as 4 1/2 cm.
2. Convert the mixed number 4 1/2 to an improper fraction. 4 1/2 is equal to (9/2).
3. Subtract the thickness of the metal, which is given as 1/4 cm, from the outer radius. So, (9/2) cm - 1/4 cm = (9/2) cm - (1/4) cm.
4. To perform the subtraction, ensure that the denominators (2 and 4) are the same. Since 2 is divisible by 4, we multiply 1/4 by 2/2. This gives us a common denominator of 8.
5. Now we can proceed with the subtraction: (9/2) cm - (1/4) cm = (9/2) cm - (2/8) cm.
6. Subtract the numerators while keeping the denominator the same: (9/2) cm - (2/8) cm = (36/8) cm - (2/8) cm = (34/8) cm.
7. Simplify the fraction if possible. In this case, both the numerator and denominator are divisible by 2, so we can simplify (34/8) cm to (17/4) cm.
8. Convert the improper fraction (17/4) back to a mixed number. Divide the numerator (17) by the denominator (4), which gives us 4 with a remainder of 1. Therefore, (17/4) cm is equal to 4 1/4 cm.

Therefore, the inner diameter of the pipe is 4 1/4 cm.