Question
A frog leaps across 24 lily pads which are of the same distance apart. It takes the frog 15 seconds to get from the ninth  lily pad to the tenth lily pad. How long does it take for the frog to leap from the eighth lily pad to the twentieth lily pad?
4 m

Click button first when a symbol is required. X

A frog leaps across 24 lily pads which are of the same distance apart. It takes the frog 15 seconds to get from the ninth  lily pad to the tenth lily pad. How long does it take for the frog to leap from the eighth lily pad to the twentieth lily pad?