202.Tim and Elan are 90km away from each other .they are starting to move towards each other simultaneously ,tim at speed 10kmph and elect at 5kmph ,if every hr they double the speed ,what is distance that tim will pass until he meets elan? [TCS-2012]
(A)45 (B)60 (C)20 (D)80
Below given are two formulae for long summation.
1) 1 + 2 + 3 + 4 + ................ + n = n(n+1)/2
2) 1^2 + 2^2 + 3^2 + 4^2 + ........ + n^2 = 1/6 n(n+1)(2n+1)
The value of
(1% of 2 + 2% of 3 + 3% of 4 + ........ + 99% of 100) will be
''The most incomprehensible about Mathematics is that it is comprehensible''.
Kiran B. Mali
As a toddler when I looked at my fingers and wondered,
you helped me to count numbers.
As a kid when I looked at stars with awe,
you helped me and told that's infinity.
As a teen when my confused mind often went blank,
you told that's zero and eventually