Question

In a call center, 6 employees working for 10 hours complete a certain task. They started working at 11:00 a.m. This continued till 5.00 pm and after that, for each hour one more employee is added till the work gets completed. At what time will they complete the work?

Options

• 7: 10 pm

• 8: 00 pm

• 7: 35 pm

• 6:35 pm

Answer 1

8: 00 pm

Explanation:

M₁D₁ = M₂D₂

MD = M₁D₁ + M₂D₂ .........M_nD_n

6 × 10 = 6 × 6 + 7x₁ + 8x₁ +.........

60 − 36 = 7 + 8 +........... n^th hour

24 = 7 + 8 + 9

i.e. 3 hr more

∴ 8 PM