Q. The three sides of a right-angled triangle have integral lengths and also form an arithmetic progression. A possible length of one of the sides is

Option
(1) 22
(2) 91
(3) 82
(4) 56

• answer is option (4): 56
  As we know the 3,4,5 form the sides of a Right-angled Triangle,
  then multiples of them also form sides of a Right-angled Triangle like
  6,8,10
  9,12,15
  .
  .
  .
  .
  .
  now multiply 3,4,5 with 14 it gives
  42,56,60
  
  so now one of the possible sides of the Right-angled Triangle is 56
  so the answer is option (4) which is 56
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