 
<translate> Tambaya. John ya yanke shawarar fara yin yawo a kusa da tafkin murabba'i. Kowane gefen tafkin yana da nisan mil 15. Jake zai iya yin tuƙi sau biyu fiye da yadda zai iya yin iyo. Yana daukar masa minti 20 ya yi ninkaya mil daya. Tsawon awa nawa ne ake bukata don a yi tuƙi a tafkin? Amsa wannan. 10 Ƙasa Wane bayani ne ya nuna cewa hakan gaskiya ne? <eng> Question. John decided to start rowing around a square lake. Each side of the lake is 15 miles. Jake can row at twice the speed he can swim. It takes him 20 minutes to swim 1 mile. How long, in hours, does it take to row the lake?
Answer. 10
What step-by-step reasoning justifies that answer? 