Option 4 : 60 pages

RRC Group D Full Mock Test

401654

100 Questions
100 Marks
90 Mins

**Given:**

Pages printed by A and B = 2400

Hours of work = 5

Days of work = 5

A’s 2.5 hrs work = B’s 1.5 hrs work

**Concept:**

Calculate the work done by A and B in 1 hour and then equate the work done by them with the total work done in 5 days.

**Formula used:**

Total unit of work = Work done by (A + B) in 1 hour × No of hours of work in 1 day × No of days of work

**Calculation:**

∵ A’s 2.5 hrs work = B’s 1.5 hrs work

⇒ A × 2.5 = B × 1.5

⇒ A/B = 1.5/2.5

⇒ A/B = 3/5

Let, A’s one hour’s work = 3x

B’s one hours work = 5x

∴ (5x + 3x) × 5hr × 5 days = 2400 pages

⇒ 8x × 5 × 5 = 2400

⇒ x = 2400/(8 × 5 × 5)

⇒ x = 12

∴ Pages printed by B in 1 hour = 5x = 5 × 12 = 60 pages.