৪ জন পুরুষ বা ৬ জন বালক একটি কাজ ২0 দিনে করতে পারে। ৩ জন পুরুষ ও ৩ জন বালক একত্রে ঐ কাজ কত দিনে করতে পারবে?
A. ১৪ দিনে
B. ১৫ দিনে
C. ১৬ দিনে
D. ১৮ দিনে
সঠিক উত্তরঃ
C.
১৬ দিনে
Explanation:
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