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Q. It is more difficult to walk on a sandy road than on a concrete road because

  • (A) sand is soft and concreter is hard.
  • (B) the friction between sand and feet is less than that between concrete and feet.
  • (C) the friction between sand and feet is more than that between concrete and feet.
  • (D) the sand is grainy but concrete is smooth.
  • Correct Answer - Option(B)
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