alleryબે મિત્રો સાથે મળીને એક હૉલ 8 દિવસમાં સાફ કરે છે. તેમાંથી એકને એકલા 24 દિવસ લાગે છે. બીજા મિત્રને એકલા લાગશે:
A12 દિવસ
B14 દિવસ
C10 દિવસ
D16 દિવસ
Answer & Solution
Correct answer: A. 12 દિવસ
બીજા મિત્રનો કાર્ય દર 1/8 - 1/24 = 2/24 = 1/12 છે, તેથી 12 દિવસ.
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