Question

in a P.T display 480 students are arranged in rows and columns.If there are 4 more students in each row than the number of rows.Find the number of students in each row.​

Answer 1

Step-by-step explanation:

GIVEN : Total numbers of students in a P.T display = 480

Let the number of columns be x & number of rows (x+4)

ATQ

x (x+4) = 480

x² +4x =480

x² +4x - 480 = 0

x² +24x -20x - 480= 0

[ by factorization method]

x(x + 24) -20(x + 24) = 0

(x+24) (x-20) = 0

x+24 = 0 or x-20 = 0

x = -24 or x = 20

But x = -24 is not possible because number of rows can't be negative.

Therefore , x = 20

Number of columns = 20

number of rows = x +4 = 20 + 4 = 24

Hence, the number of rows is 24.

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Answer 2

Step-by-step explanation:

here is your answer and once try to solve it yourself