CBSE Class 7 Answered

Respected sir/mam,

I have doubt in this question:

The sum of three nos. is98. Ifthe ratio ofmthe first tomthe second is 2:3 and that of the second TO THE third is 5:3, find the nos.

Asked by ranksahoo | 25 Nov, 2017, 07:52: PM

Expert Answer

Note: The question should be

The sum of three numbers is 98. Ifthe ratio of the first to the second is 2 : 3 and that of the second to the third is 5 : 8, find the numbers.

begin mathsize 16px style straight A space colon space straight B equals 2 space colon space 3 space straight B space colon space straight C space equals space 5 space colon space 8 equals open parentheses 5 cross times 3 over 5 close parentheses space colon space open parentheses 8 cross times 3 over 5 close parentheses equals 3 space colon space 24 over 5 Now comma straight A thin space colon space straight B space colon space straight C equals 2 space colon space 3 space colon space 24 over 5 equals 10 space colon space 15 space colon space 24 Thus comma space we space have straight A equals 98 cross times fraction numerator 10 over denominator 10 plus 15 plus 24 end fraction equals 98 cross times 10 over 49 equals 20 straight B equals 98 cross times fraction numerator 15 over denominator 10 plus 15 plus 24 end fraction equals 98 cross times 15 over 49 equals 30 C equals 98 cross times fraction numerator 24 over denominator 10 plus 15 plus 24 end fraction equals 98 cross times 24 over 49 equals 48 end style

Answered by Rashmi Khot | 29 Nov, 2017, 10:37: AM

CBSE Class 7 Answered

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