Answer:
w = 24
Step-by-step explanation:
If a 5 meter long metal bar has a mass of 40kg, this means a 1 meter long metal bar has a mass of 8kg because 40kg/5m = 8. So, 1 meter long metal bar is 8kg. This means a 3 meter long metal bar has a mass of 24kg because 8 * 3 = 24.
Answer:
24 kg
Step-by-step explanation:
Step 1. Write the proportion
5:40 = 3:x
Step 2. Multiply means (40 & 3) and then the extremes (5 & x)
5x = 120
Step 3. Divide both sides by 5 to find x
5x = 120
5 5
x = 24
alternative way,
Divide 5 by 40 to get its ratio, then divide 3 by the quotient we get earlier.
5/40 = 0.125
3/0.125 =24
