to find no. of swans
Asked by meghapte | 7th Feb, 2010, 10:43: AM
Let N be the total numbe of swans,
Swans at shore + Swans in water, swimming = Total number of swans.
7N /2 + 2 = N
7N /2 = N - 2
Sqaring both sides,
49N/4 = N2 -4N + 4
49N = 4N2 -16N + 16
4N2 - 65N + 16 = 0
N = [65±(652-4x16x4)]/8 = [65±63]/8 = 128/8 = 16.
Total number of swans are 16.
Answered by | 7th Feb, 2010, 11:19: AM
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