Question
Which city in Uttar Pradesh is known for the Rumi
Darwaza, a famous Mughal gateway?Solution
The Rumi Darwaza is a famous Mughal gateway located in Lucknow.
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Pipe A can fill a tank in 12 hours and pipe B can fill it in 15 hours. A third pipe C can empty a full tank in 20 hours. If all three pipes are opened t...
