latitude of 35degree north and 70 degree east.30degree north 90degree east.40 degree north 138degree east.

Answer 1

These are three separate locations on earth. You need a world map to locate them.

Is this a LAT/LONG map reading exercise?

35N, 70 E is in the Atlantic Ocean between North Carolina and Bermuda

30N, 90 E is very near New Orleans, LA

40N 138 E is in the Pacific Ocean, about 1000 miles west of Cape Mendocino, northern CA

Answer 2

I read you latitudes as West by mistake. Force of habit.

35N, 70 E is near Kabul, Afghanistan

30N, 90 E is near Lhasa, Tibet, China

40N 138 E is offshore of Akita, Japan in the Sea of Japan.

Answer 3

You might enjoy this description of a trip to your exact second location:
http://confluence.org/confluence.php?id=7041