# Math Help - [SOLVED] Finding Latitude

1. ## [SOLVED] Finding Latitude

Charleston, South Carolina and Toronto, Canada are 1100 km apart and lie on the same north-south line. The latitude of Charleston is 33° N. What is the latitude of Toronto?

2. Hello somanyquestions
Originally Posted by somanyquestions
Charleston, South Carolina and Toronto, Canada are 1100 km apart and lie on the same north-south line. The latitude of Charleston is 33° N. What is the latitude of Toronto?
Taking the circumference of the earth as 40,000 km, the angle at the centre of the earth subtended by an arc of length 1100 km is:
$\frac{1100}{40000}\times 360^o$
$= 9.9^o$
So, since Canada is North of the USA (or so it was the last time I was there), the latitude of Toronto is $33+9.9 = 42.9^o$ N.