Suppose you are trying to find your

longitude and start looking for when the

shadows are shortest at your house.

You discover that this happens

at 1:14:20 p.m. EDT (Eastern Daylight

Savings Time).

What is this time in GMT?

Remember that EDT = GMT - 4.

since Greenwich is 4 hours ahead of Eastern Daylight Savings

time, add 4 hours to the time in EDT.