Subject
Quantitative Aptitude
Topic
Miscellaneous
In what ratio must a grocer mix two varieties of pulses costing 15 tk and 20 tk per kg respectively so as to get a mixture worth 16.50 tk per kg?
In what ratio must a grocer mix two varieties of pulses costing 15 tk and 20 tk per kg respectively so as to get a mixture worth 16.50 tk per kg?
ক)
3:7খ)
5:7গ)
7:3ঘ)
7:5Explanation
(দুই ধরনের ডাল প্রতি কেজিতে দাম যথাক্রমে ১৫ টাকা এবং ২০ টাকা।একজন দোকানদার কোন অনুপাতে মিশ্রিত করলে ডাল মিশ্রনের প্রতি কেজির গড় মূল্য ১৬.৫০ টাকা হবে?) ধরি, ১৫ টাকার ডালের ওজন x কেজি ২০ টাকার ডালের ওজন y কেজি প্রশ্নমতে, (১৫×১৫ টাকার ডালের ওজন)+(২০×২০ টাকার ডালের ওজন) =১৬.৫( ১৫ টাকার ডালের ওজন +২০ টাকার ডালের ওজন) or,15x+20y=16.x(x+y) or,15x+20y=16.5x+16.5y or,20y-16.5y=16.5x-15x or,3.5y=1.5x or,x/y=3.5/1.5 x:y=7:3Related questions
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