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For The Mathematically Inclined

Anil Saigal

Problem 1:
How many ml 30% of peroxide (H2O2) should be poured into 100ml H2O to give a 20% solution?

Problem 2:
If you mix 41 liters of water with temperature of 43 °C, 53 liters warm of 76 °C and 75 liters water of 40 °C. What is the temperature of the mixed water immediately after mixing?


Please send your solutions anil@lokvani.com. 

Use Problem Solutions M-092718 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. 

Problems from 09/13/18

Problem 1:
A cylindrical vessel  of 20 feet diameter and 50 feet height contains 100 spherical balls of 1 feet diameter.  If the remaining volume is filled with water, how many liters of water can it hold?

Problem 2:

A cylindrical vessel  of 20 feet diameter and 50 feet height  contains water to the brim. If a sphere of 1 feet diameter is added to the vessel every 5 minutes, how long does it take for half the water to fall out?

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

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