Ram is 5 years elder than Lakshman who is 4 years elder than Bharath. The sum of their ages is 61. Find the age of Lakshman.
Moving along a stream, a boat travels 16 km and moving against the stream, it travels 12 km. The time taken for the entire journey is 5 hours. The upstream speed and downstream speed are in the ratio of 1:2. Find the speed of the stream.
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