alleryଦୁଇଟି ସଂଖ୍ୟାର ଅନୁପାତ 5 : 7 ଏବଂ ସେମାନଙ୍କ ମଧ୍ୟରେ ଅନ୍ତର 12 ଅଟେ। ସେମାନଙ୍କର ଯୋଗଫଳ ହେଉଛି:
A60
B84
C96
D72
Answer & Solution
Correct answer: D. 72
1. ସଂଖ୍ୟା ଦୁଇଟିକୁ 5x ଏବଂ 7x ନିଅନ୍ତୁ ଯାହାଦ୍ୱାରା ସେମାନଙ୍କ ଅନୁପାତ 5 : 7 ରେ ସ୍ଥିର ରହିବ।
2. ସେମାନଙ୍କ ଅନ୍ତର ହେଉଛି 7x - 5x = 2x।
3. ପ୍ରଦତ୍ତ 2x = 12 ଅନୁଯାୟୀ, ଗୋଟିଏ ଭାଗ ହେଉଛି x = 6।
4. ସଂଖ୍ୟା ଦୁଇଟି ହେଉଛି 30 ଏବଂ 42, ତେଣୁ ସେମାନଙ୍କ ଯୋଗଫଳ 72।
5. ସେହିପରି ଯୋଗଫଳ ହେଉଛି 12x = 12 x 6 = 72।
_Source: syllabus Maths, Ch 7 'Comparing Quantities', S7.1 Recalling Ratios and Percentages_
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