Madhu walks 15 metres towards north, then she turns left at $90^{\circ}$ and walk 30 metres, then turns right at $90^{\circ}$ and walks $25$ metres. How far, she is form the starting point and in which direction ?

Question

( A ) 50 mt., west
( B ) 50 mt., north-west
( C ) 55 mt., north -east
( D ) 60 mt., north