A 30-inch rope was cut into two pieces .The longer piece was 6 inches shorter than twice the lengthiof the shorter piece .What was the length ( in inch ) of the longer piece ?

A 12

B 18

C 20

D 24

Solution

Correct Answer: Option B

মনে করি ,
             ছোট অংশের দৈর্ঘ্য =x ইঞ্চি
অতএব ,বড়     "          "  =(2x-6) "
প্রশ্নমতে, ,2x-6+x=30
           বা,3x=36
           বা, x=12
অতএব ,বড় অংশের দৈর্ঘ্য =2×12-6
                                        =24-6
                                        =18 ইঞ্চি

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