alleryકિરણ લતા કરતાં ત્રણ ગણી કાર્યક્ષમ છે, જેને એકલા 60 દિવસની જરૂર પડે છે. બંનેને સાથે મળીને જરૂર પડશે:
A18 દિવસ
B12 દિવસ
C15 દિવસ
D20 દિવસ
Answer & Solution
Correct answer: C. 15 દિવસ
લતા પ્રતિ દિવસ 1/60 અને કિરણ 3/60 કામ કરે છે, કુલ 4/60 = 1/15, તેથી 15 દિવસ.
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