The scoring is based on the scoring rules of real tennis. Real, here, refers to royal as opposed to fake. I real tennis, the scores were 15, 30 and 45 but the last got shortened to 40 in the "new" game of lawn tennis.
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fraction equivalent of 15/40 = 30/80
the number = 20 Let N = the number 30% of N = 15% of 40 30% * N = 15% * 40 0.30N = 0.15* 40 0.30N/0.30 = 6/0.30 N = 20
2L + 2W 2*20=40 2*15=30 40+30= 70 ft
30-40 because u multiply 15&20 by 2
40