If 5 students utilise 18 pens in 9 days, how long at the same rate, will 66 pens last for 15 students?
Answer & explanation
Correct answer: option 1
According to the question:
\(\frac{\text{5 x 9} }{18 }\) = \(\frac{\text{ Days x 15} }{66 }\)
\(\frac{\text{45} }{18 }\) = \(\frac{\text{ Days x 15} }{66 }\)
Days = 11
Thus, the answer is 11 days.