Two numbers are in the ratio 5:4 and their difference is 10.What is the smallest number?

A 30

B 40

C 50

D 60

E none

Solution

Correct Answer: Option B

আনুপাতিক ব্যবধান =৫-৪ =১
প্রকৃত ব্যবধান =১০   অর্থাৎ  বড়  সংখ্যা =৫x১০=৫০
ছোট সংখ্যা=৪x১০=৪০

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