Motion in two dimension problem.

Two identical sheets of paper, vertical with the ground and parallel to each other, are placed $150 \text{ m}$ apart. A bullet hits both the sheets such that the hole in the second sheet is $15 \text{ cm}$ below the hole in the first sheet. Find the speed of the bullet just before it hits the first sheet.

Details and Assumptions:

• The bullet hits the first sheet horizontally.
• Neglect air resistance.
• The bullet does not lose speed on passing through the sheets.
• Acceleration due to gravity $g = 10 \text{ m/s}^2.$