Ans it

50.   18 years ago, Sam was thrice as old as Trishu . Sam is 54 years old now,

(a)    How old will Sam be 5 years from now?
(b)    ​How old was Trishu 5 years ago? 

             (a)                              (b)   
      
A.        59 years                  25 years    
B.        54 years                  30 years
C.        54 years                  25 years
D.        59 years                  20 years
      

Dear Student,


present age of sam=54age of sam 18 years ago=54-18=36that time sam was thrice as old as trishuhence 36=3×age of trishutherefore trishu was 363=12 years oldpresent age of trishu=12+18=30a)after 5 years sam will be 54+5=59 years oldb) age of trishu 5 years ago=30-5=25Hence option A is correct
Regards,

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the answer is A.
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A.59 years          25 years
it is because 18 years ago Sam was 36 and Trishu was 12 as Sam was thrice as old as Trishu .
Now Sam is 36 +18 = 54 and Trishu is 12 + 18 = 30 .
a) Five years from now Sam will be 54 + 5 = 59
b) Five years ago Trishu was 30 - 5 = 25
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