Question
A frog leaps across 21 lily pads which are of the same distance apart. It takes the frog 6 seconds to get from the twelfth  lily pad to the thirteenth lily pad. How long does it take for the frog to leap from the second lily pad to the sixteenth lily pad?
4 m

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A frog leaps across 21 lily pads which are of the same distance apart. It takes the frog 6 seconds to get from the twelfth  lily pad to the thirteenth lily pad. How long does it take for the frog to leap from the second lily pad to the sixteenth lily pad?