Roads in Manhattan are called streets and avenues.
Streets run from east to west and avenues run from
north to south.
The distance between streets is around 80 m and the
distance between avenues is around 260 m, as shown
below.
Point X is at the centre of the junction of 15th Street
and 7th Avenue.
Point Y is at the centre of the junction of 21st Street and
4th Avenue.
Using the information above,
a) calculate the straight-line distance between point X
and point Y.
b) calculate the shortest distance along the roads to get
from point X to point Y.
Give your answers to the nearest metre.