a) 56
b) 74
c) 76
d) 75
Answer: d
Explanation: Let there be n rows, then number of trees in each row = (n + 1)
Total number of trees,
n × (n +1) = 5550
Now, at this moment this problem can be solved in two ways. First by finding the roots of quadratic equation. Second, by using the values from options.
74 × 75 = 5550
i.e. (n + 1) = 75
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