A man arranges mango trees in a triangular orchard: 1 tree in the first row, 3 in the second, 5 in the third and so on (odd numbers). How many trees are there in the first 15 rows altogether?

Question

Accepted Answer

225. a = 1, d = 2, n = 15. S15 = 15/2[2(1)+14(2)] = 15/2(2+28) = 15/2(30) = 15 x 15 = 225.

A man arranges mango trees in a triangular orchard: 1 tree in the first row, 3 in the second, 5 in the third and so on (odd numbers).
How many trees are there in the first 15 rows altogether?

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More Class 10 AP Word Problems practice

A man arranges mango trees in a triangular orchard: 1 tree in the first row, 3 in the second, 5 in the third and so on (odd numbers).How many trees are there in the first 15 rows altogether?

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 10 AP Word Problems practice

A man arranges mango trees in a triangular orchard: 1 tree in the first row, 3 in the second, 5 in the third and so on (odd numbers).
How many trees are there in the first 15 rows altogether?