Question

8. A certain city has a circular wall around it and this
wall has four gates pointing North, South, East and
West. A house stands outside the city, three kilometres
North of the North gate and it can just be seen from a
point nine kilometres East of the South gate. What is
the diameter of the wall that surrounds the city?
(a) 6 km
(b) 9 km
(c) 12 km
(d) None of these


pls answer with steps​

Answer 1

the above question ans is 6km