Subject
Quantitative Aptitude
Topic
Areas & Volumes
The breadth of a rectangular field is 60% of its length.If the perimeter of a field is 800 m,what is the area of the field?
The breadth of a rectangular field is 60% of its length.If the perimeter of a field is 800 m,what is the area of the field?
ক)
18750 sq.mখ)
37500 sq.mগ)
40000 sq.mঘ)
48000 sq.mExplanation
(প্রশ্ন- একটি আয়তাকার মাঠের প্রস্থ এর দৈর্ঘ্যের ৬০%।যদি মাঠের পরিসীমা ৮০০ মিটার হয় তবে ক্ষেত্রফল কত?) দৈর্ঘ্য x হলে প্রস্থ =x×60%=x×3/5 =3x/5 অতএব পরিসীমা =2(দৈর্ঘ্য+প্রস্থ)=800 or,2(x+3x/5)=800 or,(5x+3x)/5 =400 or,8x=400×5 x=(400×5)/8 =250 m অতএব ক্ষেত্রফল =x×3x/5 =250×3/5×250 =37500 sq.mRelated questions
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