Question

A ship can cover a certain distance in 10hrs at a speed of 16 nautical miles per hours by how much should its speed be increased so that it takes only 8hours to cover the same distance

Answer 1

Answer = 20 miles per hour.

$distance = time \times velocity.$
$10 \times 16 = 8 \times x \\ x = 10 \times 2 \\ x = 20.$