in a hostel there were 100 students . to accommodate 40 more students the average is decreased by rupees 10 . but total expenditure decreased by rs . 400 . find the total expenditure of the hostel now ?
"100 x - 400 = 140 ( x – 10 ) x = 25 100 * 25 - 400 = 2100 answer : e"
multiply(subtract(divide(add(multiply(add(100, 40), 10), 400), 40), 10), add(100, 40))