BD Merit - Freelancing, BCS, Bank, Primary, Admission, NTRCA

1 . Nazir can wash his car 15 minures while his son takes twice as long. If they work together how many minutes will the job take them?

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Answer: Option C

Explanation:

His son can wash the car in (15 × 2 = 30) minutes

Nazir can wash 1/15 part of the car in 1 minute

His son can wash 1/30 part of the can in 1 minute

Together they can wash (1/15 + 1/30 = 1/10) part of the car in 1 minute

So, together they can wash the whole car in 10 minutes.