Multiple choice

A group of students planned to complete a construction in 60 days. Out of them 5 students could not come and the work was completed in 80 days. the total number of students in the beginning is-

  1. 25

  2. 35

  3. 20

  4. 15
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Using the inverse proportion formula for work problems: M1D1 = M2D2. Let x be initial students: x × 60 = (x-5) × 80. Solving: 60x = 80x - 400, so 20x = 400, giving x = 20. When 5 students are absent, 15 students complete the work in 80 days.

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