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The cruising speed of an A 320 is 511 mph. This is the same as
828 km/h.
Answer : 80 cows.
There are (H) horses and (C) cows.
H + C = 100 (number of heads) : H = 100 - C
4H + 3C = 320 (number of legs) : substituting for H gives :-
4(100 - C) + 3C = 320 : 400 - 4C + 3C = 320 : C = 80(Therefore H = 100 - 80 = 20)
320 km/h = about 198.84 mph
It's 320 km/h.
170 mph (275km/h)