alleryબે કડિયાને એક દીવાલ માટે અનુક્રમે 14 અને 21 દિવસની જરૂર પડે છે. સાથે મળીને કામ કરતાં તેમને જરૂર પડશે:
A8.4 દિવસ
B8 દિવસ
C7 દિવસ
D9 દિવસ
Answer & Solution
Correct answer: A. 8.4 દિવસ
પ્રતિ દિવસ 1/14 + 1/21 = 5/42, તેથી દીવાલ માટે 42/5 = 8.4 દિવસ લાગે છે.
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