For The Mathematically Inclined

Problem 2:
From an iron cube of edge 37 cm,a maximum cylinder is lathed. Hom mmany kilograms of iron is wasted? Assume the density of iron used is 7800kg/m3.

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Problems from 09/27/18

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 Â°C, 53 liters warm of 76 Â°C and 75 liters water of 40 Â°C. What is the temperature of the mixed water immediately after mixing?

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