Question

From an iron bar of length (20 – 7y) m, a piece of length (2y – 1) m was cut. Find the length of the remaining iron bar.​

Answer 1

Answer:

Correct option is

A

10000

F=AYαΔθ

F=10

−3

×10

11

×10

−6

×100

F=10000N

Answer 2

Answer: Length of the remaining iron bar
= (20 - 7x) - (2x-1)
= 20 -7x - 2x + 1 + (21 - 9x) m

Step-by-step explanation: Hope this helps! :)