P can build a wall in 10 days, while Q can destroy it in 15 days. If they work on alternate days starting with P, in how many days will the wall be completely built for the first time?
Options:
- A: 48 days
- B: 50 days
- C: 55 days
- D: 60 days
Related Practice Questions:
- Why is copper considered highly pure and extensively used in religious rituals by Hindus today according to the historical context of natural resources?
- Which of the following regions is described by R.S. Sharma as "the most coveted and contested area" fought over by important ruling powers in northern India?
- Paper currency was not used in ancient India. In which century was paper currency finally introduced to India?
- The earliest agricultural settlements and states in ancient northern India were founded along the Himalayan foothills (the "terai" route) during which period?
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