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JEE Class main Answered

Pls answer this??
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Asked by Mastersword650 | 05 May, 2020, 09:53: AM
answered-by-expert Expert Answer
In 10 km sprint, 
 
Let's consider the speed of Usain Bolt be  x
speed of Tyson gay be  y 
and speed of Yohan Blake be  z 
 
 
T i m e space t a k e n space b y space U s a i n space B o l t space t o space c o m p l e t e space 10 space k m space equals space 10 divided by x space equals space left parenthesis 10 minus 1 right parenthesis divided by y space equals 9 divided by y space equals space a... space left parenthesis 1 right parenthesis space left parenthesis space I t space i s space g i v e n space t h a t space U s a i n space b e a t s space T y s o n space b y space 1 space k m right parenthesis

A l s o comma space
t i m e space t a k e n space b y space T y s o n space a n d space Y o h a n space equals space 10 divided by y space equals space 9 divided by z space... left parenthesis 2 right parenthesis.... space space left parenthesis T y s o n space b e a t s space Y o h a n space b y space 1 space k m right parenthesis space
T h u s comma space
x space equals space 10 divided by a comma space space y space equals space 9 divided by a comma space... left parenthesis 3 right parenthesis space

T h u s comma space
w e space c a n space m a k e space r e l a t i o n space b e t w e e n space s p e e d space o f space U s a i n space a n d space Y o h a n space a s comma space

z space equals space fraction numerator 9 y over denominator 10 end fraction space equals space fraction numerator 9 space begin display style open parentheses bevelled 9 over a close parentheses end style over denominator 10 end fraction space equals space fraction numerator 81 over denominator 10 space a end fraction space... space left parenthesis F r o m space left parenthesis 1 right parenthesis space a n d space left parenthesis 3 right parenthesis right parenthesis space


W i t h space t h i s space w e space c a n space c a l c u l a t e space t h e space d i s tan c e space c o v e r e d space b y space Y o h a n space i n space t h e space t i m e space U s a i n space c o m p l e t e s space t h e space s p r i n t space o f space 10 space k m space

T h u s comma space d i s tan c e space c o v e r e d space i n space t i m e space a space b y space Y o h a n space i s comma space
equals space a space cross times open parentheses fraction numerator 81 over denominator 10 space a end fraction close parentheses space equals space 8.1 space k m space

T h u s comma space d i s tan c e space b e t w e e n space U s a i n space a n d space Y o h a n space equals space 10 space k m space minus space 8.1 space k m space equals space 1.9 space k m space

T h u s comma space U s a i n space b e a t s space Y o h a n space b y space 1.9 space k m space o r space 1900 space m e t r e s. space
Answered by Shiwani Sawant | 05 May, 2020, 01:47: PM
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