Question

5. A gardener planted 1521 trees in rows such that the number of rows was equal to the number of plants in each row. Find the number of rows. ​

Answer 1

Given :

• Total No of trees = 1521
• Trees are planted such that no of rows = no of plants in each row.

Need to Find :

• Number of rows=?

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Solution:

let number of trees in each row be =n

given number of trees in each row = number of rows

=> number of rows = n

now number of total plants = no of rows × no of plants in each row

=> total no of plants = n×n

but we know,

=> Total no of plants = 1521

thus we can say,

n×n= 1521

$n = \sqrt{1521} \\ \implies \: n = \sqrt{39 \times 39} \\ \implies \: n = 39$

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Number of trees in each row = 39

Answer 2

Answer:

There are 39 raws.

Step-by-step explanation:

Total no. of trees = 1521

Let the no. of raws be x

Since,

No. of raw = no. of plant in a raw

Therefore,

No. of plant in a raw = x

Now,

Total no. of plant = no. of raws × no. of plant in a raw

=> 1521 = x × x

=> 1521 = x^2

=> x^2 = 1521

=> x = √1521

=> x = √3×3×13×13

=> x = 3×13

x = 39 = no. of raws

Hence,

There are 39 raws.