A swimming pool is initially field to a a depth of 96 inches. After 2 weeks, the death has decreased to 92½ inches. Assuming that the depth decreased at a constant rate, after how many days would the water depth have reached 93½ inches?

A 3

B 9

C 7

D 6

Solution

Correct Answer: Option B

 2 সপ্তাহ বা 14 দিনে হ্রাস পায়= (96- 92½)= 3½ ইঞ্চি
মোট হ্রাস পাবে (96- 93¾) ইঞ্চি= 9/4 ইঞ্চি
3½ বা 7/2 ইঞ্চি হ্রাস পায় 14 দিনে
            9/4 ইঞ্চি হ্রাস পায় {(2×14×9)/7×4}= 9দিনে

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