Virat can complete a work in 30 days and Daniel is 60% more efficient than Virat to complete the same work. Find the total time taken by Daniel to complete the work.

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SSC CGL 2023 Tier-I Official Paper (Held On: 14 Jul 2023 Shift 3)
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  1. \( 16 \frac{3}{5} \text { days } \)
  2. \( 18 \frac{3}{4} \text { days } \)
  3. \(19 \frac{5}{3} \text { days } \)
  4. \(17 \frac{5}{3} \text { days }\)

Answer (Detailed Solution Below)

Option 2 : \( 18 \frac{3}{4} \text { days } \)
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Detailed Solution

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Given

Daniel is 60% more efficient than Virat.

Virat can complete a work in 30 days.

Concept

Efficiency is inversely related to time.

Work done = efficiency × time

Calculation

Let the efficiency of Virat is 100

So, the efficiency of Daniel is 160

The ratio of efficiency, Virat: Daniel = 100: 160

⇒ 5 : 8

It is inversely related to time

Ratio of time = 8 : 5

8 : 5 = 30 : x

So, 8 → 30 days

then

→ 30/8 days

⇒ 5 = x 150/8 days

= 75/4 = 18(3/4) days

Daniel can complete a work in 18(3/4) days.

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