 
<translate> Ka yi la'akari da wannan tambayar. Wata gona ta yi amfani da na'urori biyu masu girbi, H da K, don girbe alkama mai girman eka 100. Injin girbi H, yana aiki shi kaɗai a tsayayyen saurinsa, ya girbe gona mai girman eka 40 a cikin awanni 8. Daga nan aka kawo injin girbi K, kuma injin girbi H da K, suna aiki tare da daidaitattun ƙididdigar su, sun girbe sauran kadada na alkama a cikin awanni 6. Na'urar girbi K ta girbe gona da kadada nawa a awa daya? Zaɓuɓɓuka: (A) 4 (B) 8 (C) 12 (D) 13 (E) Goma sha biyar Menene tsarin tunani mataki-mataki don isa ga amsar: (A)? <eng> Consider the question. A farm used two harvesting machines, H and K, to harvest 100 acres of wheat. Harvesting machine H, working alone at its constant rate, harvested 40 acres of wheat in 8 hours. Then harvesting machine K was brought in, and harvesting machines H and K, working together at their respective constant rates, harvested the remaining acres of wheat in 6 hours. Harvesting machine K harvested how many acres of wheat per hour?
Options:
(A)  4
(B)  8
(C)  12
(D)  13
(E)  15
 What is the step-by-step reasoning process to arrive at the answer: (A)? 