A map usesgrid references for positions. A grid reference for a point of 987654 means the
point is 987 m East and 654 m North of the fixed referencepoint.
A bridge FG crosses a river.
The length of the bridge is 24 m.
GFH is 36˚.
The grid reference for F is 163871.
Find the grid reference for the end of the bridge at G.