1/3 of 210 is 70. 210 plus 70 equals 280.
210 + 310 + 410 = 930
15 + 210 = 225
30 + 5 + 210 = 245
4 + 210 + 5100 = 5314
210 - (20+5)*8 = 210 - 25*8 = 210 - 200 = 10
1 or 210 km contour interval plus the 45 km contour
330
210
the answer is 210
210
210