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For The Mathematically Inclined

Anil Saigal
12/06/2018

Problem 1:

Honza is 13 years old and Peter 21 years old. After how many years are their ages will be at ratio 7: 9?


Problem 2:
A man divides $10,000 into two investments, one returns  5% and the other at 8% per year. The returns are compounded into the principal.   Find how much is invested at each rate so that the two investments produce the same return after 10 years.


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Please send your solutions anil@lokvani.com. 

Use Problem Solutions M-120618 as the subject line. Please include your full name in the text of the main message. Everyone with the right answer will be acknowledged in the next issue of Lokvani. 

Please do not post your solution in Post Comments. No credit will be given for solutions not sent to anil@lokvani.com. 

If you need clarification on any problem, please contact anil@lokvani.com. 

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Problems from 11/22/18

Problem 1:
The top of the pole we see at an angle of 45°. If we approach the pole by 10 m, we see the top of the pole at an angle of 60°. What is the height of the pole?


Problem 2:
A plane flies at altitude 6500 m. At the time of first measurement was to see the elevation angle of 21° and second measurement of the elevation angle of 46°. 

Calculate the distance the plane flew between the two measurements.

Congratulations to Ramachandran Balakrishna who was the winner of the last set of puzzles



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