Question

If2x+1, 4x, 13-x aro in orithmetic progression then x is equal to
A) 2
B) 3
C)4
D) 5.
2)The radius of a semicircular protector is 35m then its perimeter
A) 90m
B) 45m
C) 180m
D) 120m​

Answer 1

Hey mate hope it helps you..

1. 4x - 2x - 1 = 13-x -4x

2x - 1 = 13 - 5x

7x = 14

x = 2

2. perimeter = πR = 35 × 22/7 = 110m