Answer:
x=7
Step-by-step explanation:
Answer:
0.25D^2 π in^2.
Step-by-step explanation:
The cross section is a circle of diameter D inches, so its radius is 0.5D inches.
The area of cross section is πr^2
= (0.5D)^2 π
= 0.25D^2 π in^2.
Answer: The truck weighs 3,900 kilograms.
Step-by-step explanation:
3,900,000÷1000=3,900