Question
A frog leaps across 15 lily pads which are of the same distance apart. It takes the frog 9 seconds to get from the ninth  lily pad to the twelfth lily pad. How long does it take for the frog to leap from the fourth lily pad to the thirteenth lily pad?
4 m

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A frog leaps across 15 lily pads which are of the same distance apart. It takes the frog 9 seconds to get from the ninth  lily pad to the twelfth lily pad. How long does it take for the frog to leap from the fourth lily pad to the thirteenth lily pad?