Discuss Forum
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?
- A. 5
- B. 5
- C. 5
- D. 5
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.
Post your comments here: