Last updated on May 26th, 2025
If a number is multiplied by the same number, the result is a square. The inverse of the square is a square root. The square root is used in the field of vehicle design, finance, etc. Here, we will discuss the square root of 1385.
The square root is the inverse of the square of a number. 1385 is not a perfect square. The square root of 1385 is expressed in both radical and exponential form. In the radical form, it is expressed as √1385, whereas (1385)^(1/2) in the exponential form. √1385 ≈ 37.204, which is an irrational number because it cannot be expressed in the form of p/q, where p and q are integers and q ≠ 0.
The prime factorization method is used for perfect square numbers. However, the prime factorization method is not used for non-perfect square numbers where the long-division method and approximation method are used. Let us now learn the following methods:
The product of prime factors is the prime factorization of a number. Now let us look at how 1385 is broken down into its prime factors:
Step 1: Finding the prime factors of 1385
Breaking it down, we get 5 x 277: 5^1 x 277^1
Step 2: Now we found out the prime factors of 1385. The second step is to make pairs of those prime factors. Since 1385 is not a perfect square, the digits of the number can’t be grouped in pairs. Therefore, calculating 1385 using prime factorization is not feasible for finding an exact square root.
The long division method is particularly used for non-perfect square numbers. In this method, we should check the closest perfect square number for the given number. Let us now learn how to find the square root using the long division method, step by step:
Step 1: To begin with, we need to group the numbers from right to left. In the case of 1385, we need to group it as 85 and 13.
Step 2: Now we need to find n whose square is less than or equal to 13. We can say n is '3' because 3 x 3 = 9, which is less than 13. Now the quotient is 3, and after subtracting 9 from 13, the remainder is 4.
Step 3: Bring down 85 to make the new dividend 485. Add the old divisor 3 with itself to get 6, which will be our new divisor.
Step 4: Now we get 6n as the new divisor, we need to find the value of n.
Step 5: Find 6n x n ≤ 485. Let us consider n as 7, so 67 x 7 = 469.
Step 6: Subtract 469 from 485, the remainder is 16, and the quotient is 37.
Step 7: Since the dividend is less than the divisor, we need to add a decimal point. Adding the decimal point allows us to add two zeroes to the dividend. Now the new dividend is 1600.
Step 8: Now we need to find the new divisor, which is 744 because 744 x 2 = 1488.
Step 9: Subtracting 1488 from 1600, we get the result 112.
Step 10: Now the quotient is 37.2.
Step 11: Continue doing these steps until we get two numbers after the decimal point. Continue until the remainder is zero or sufficiently small.
So the square root of √1385 is approximately 37.20.
The approximation method is another method for finding square roots. It is an easy method to find the square root of a given number. Now let us learn how to find the square root of 1385 using the approximation method.
Step 1: Now we have to find the closest perfect squares of √1385. The closest smaller perfect square to 1385 is 1369, and the closest larger perfect square is 1444. √1385 falls somewhere between 37 and 38.
Step 2: Now we need to apply the formula: (Given number - smallest perfect square) / (Greater perfect square - smallest perfect square) Using the formula: (1385 - 1369) / (1444 - 1369) = 16/75 ≈ 0.213 Add this to the lower estimate: 37 + 0.213 = 37.213.
So the approximate square root of 1385 is 37.213.
Students do make mistakes while finding the square root, such as forgetting about the negative square root, skipping long division methods, etc. Now let us look at a few of those mistakes that students tend to make in detail.
Can you help Max find the area of a square box if its side length is given as √1385?
The area of the square is approximately 1920.64 square units.
The area of the square = side².
The side length is given as √1385.
Area of the square = side² = √1385 x √1385 ≈ 37.204 x 37.204 ≈ 1385.
Therefore, the area of the square box is approximately 1385 square units.
A square-shaped building measuring 1385 square feet is built; if each of the sides is √1385, what will be the square feet of half of the building?
Approximately 692.5 square feet
We can just divide the given area by 2 as the building is square-shaped.
Dividing 1385 by 2 = we get 692.5 So half of the building measures approximately 692.5 square feet.
Calculate √1385 x 5.
Approximately 186.02
The first step is to find the square root of 1385, which is approximately 37.204.
The second step is to multiply 37.204 by 5.
So 37.204 x 5 ≈ 186.02.
What will be the square root of (1385 + 15)?
The square root is approximately 37.54
To find the square root, we need to find the sum of (1385 + 15). 1385 + 15 = 1400, and then √1400 ≈ 37.42.
Therefore, the square root of (1385 + 15) is approximately ±37.42.
Find the perimeter of the rectangle if its length ‘l’ is √1385 units and the width ‘w’ is 38 units.
We find the perimeter of the rectangle is approximately 150.41 units.
Perimeter of the rectangle = 2 × (length + width)
Perimeter = 2 × (√1385 + 38) = 2 × (37.204 + 38) = 2 × 75.204 ≈ 150.41 units.
Jaskaran Singh Saluja is a math wizard with nearly three years of experience as a math teacher. His expertise is in algebra, so he can make algebra classes interesting by turning tricky equations into simple puzzles.
: He loves to play the quiz with kids through algebra to make kids love it.