Two balls are projected at different angles from the same place and with the same initial speed of $50 \mathrm{~m} / \mathrm{s}$. Both balls have the same range of 216 m . The difference in their times of flight is close to

• A

  14.4 s
• B

  7.8 s
• Correct answer
  C

  3.6 s
• D

  0 s

Hence, the correct answer is option: 'C'.