alleryପାଇପ୍ ଗୁଡ଼ିକ 8 ଏବଂ 12 ଘଣ୍ଟାରେ ଏକ ଟାଙ୍କି ପୂର୍ଣ୍ଣ କରନ୍ତି। ଉଭୟ 2 ଘଣ୍ଟା ପାଇଁ ଖୋଲା ରୁହନ୍ତି, ତା’ପରେ ପ୍ରଥମଟି ବନ୍ଦ ହୋଇଯାଏ। ଦ୍ୱିତୀୟଟିକୁ ଆହୁରି ଆବଶ୍ୟକ ହେବ
A6 ଘଣ୍ଟା
B9 ଘଣ୍ଟା
C7 ଘଣ୍ଟା
D8 ଘଣ୍ଟା
Answer & Solution
Correct answer: C. 7 ଘଣ୍ଟା
ଦୁଇ ଘଣ୍ଟାରେ 2 x 5/24 = 5/12 ପୂର୍ଣ୍ଣ ହୁଏ; ଅବଶିଷ୍ଟ 7/12 ପାଇଁ ପ୍ରତି ଘଣ୍ଟାରେ 1/12 ହିସାବରେ 7 ଘଣ୍ଟା ଲାଗେ।
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