Question

the expenditure incurred for taking 25 students for a picnic is Rs 625. what will be the the expenditure for 40 students

Answer 1

Let the number of students be ‘x’

2000x = (x – 5) (2000 + 20x)

2000x = 2000x + 20x² – 10000 – 100x

0 = 20x² – 10000 – 100x

20x² – 10000 – 100x = 0

x² – 500 – 5x = 0

x² – 25x + 20x – 500 = 0

x (x – 25) + 20 (x – 25) = 0

(x + 20) (x – 25) = 0

x = –20, 25

MARK me as brainlist...