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For The Mathematically Inclined

Anil Saigal
06/05/2019

Problem 1:
An object launched vertically up returns to the launch site in 6 seconds. It was launched at a speed of 1000 m/s. What height did it reach? Assume negligible air resistance and and g  = 10 ms-2.



Problem 2:
From the top of the 80m high tower, the body is thrown horizontally with an initial speed of 15 m/s. At what time and at what distance from the foot of the tower does the body hit the horizontal surface of the Earth? (use g = 10 ms-2)


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Please send your solutions anil@lokvani.com. 

Use Problem Solutions M-062019 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 - 06/06/19

Problem 1:
A company sent four painters to paint a school. They should be done in 12 days. After 3 days, one painter got ill. After 5 days, another painter got ill.  How long will the remaining painters paint the school?

Problem 2:
4 workers can lay the floor  in a school in 20 days. After 2 days 4 more workers join them.  After 5 days, 3 of them decide to work half the time. How long did it take to lay the floor.   


Congratulations to Vijay Aivalli and Kishore Balsara, who were the winners of the last set of puzzles. 



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