A ship leaves on a long voyage. When it is 18 miles from the shore, a sea plane,

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A ship leaves on a long voyage. When it is 18 miles from the shore, a sea plane, whose speed is ten times that of ship, is sent to deliver mail. How far from the shore does the sea plane catch up with the ship? (1994)

Options:

A . 24 miles

B . 25 miles

C . 22 miles

D . 20 miles

Answer: Option D
:
D
The ship is 18 miles from the shore, as the speed is in the ratio of 1:10 the distance will also be in the ratio of 1:10.
When the ship travels 1 mile the plane will travel 10 miles
At this point the ship is 19 miles from the shore and the plane is 10 miles away from the shore.
Next when the ship moves by 1 mile covering 20 miles totally the plane will also cover the same distance of 20 miles hence will meet the ship

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