Question

Let z be complex number such that |(z - i)/(z + 2i)| = 1 and |z| = 5/2. Then the value of |z + 3i| is :

(1) √10

(2) 2√3

(3) 7/2

(4) 15/4

Answer 1

Answer is (3) 7/2

Answer 2

Answer is (3) 7/2