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A person invests money in three differen...

A person invests money in three different schemes for 6 years 10 years and 12 years at 10%, 12% and 15% simple interest respectively. At the completion of each scheme,he gets the same interst, he gets the same interest. The ratio of his investment is(एक यक्ति तीन धनराशियो को 6 वर्षो, 10 वर्षो व् 12 वर्षो के लिए क्रमश 10 % 12 % व् 15 % की बियाज़ दरो पर निवेश करता है तथा स्कीम समाप्त होने पर तीनो राशियो पर उसे सामान बियाज प्राप्त होता है तो निवेश की गई धनराशियो का अनुपात होगा)

A

`6:3:2`

B

`2:3:4`

C

`3:4:6`

D

`3:4:2`

लिखित उत्तर

Verified by Experts

(a) Let the principal in each case(माना की प्रतियेक स्तिथि में मूलधन).100units
`{:("",I^(st)part,II^(nd)part,III^(rd)part),("Principal",100_(xx6),100_(xx3),100_(2),("Rate",10,12,15),("Time",6,10,12):} `
Interest-Interest is same in each, so equal the interest(प्रतियेक स्तिथि में बियाज बराबर होगा, इसलिए बियाज को बराबर करने पर)
Hence required ratio=600:300:200 of sum 6:3:2
Alternate / (वैकल्पिक विधि )
When interset is equal then sum of amount will be distributed in following ratio. (जब बियाज बराबर होता है तब राशि निमन अनुपात में वितरित होती है)
=Required ratio of sum (राशि का अभीस्ट अनुपात)
`=1/(R_(1)T_(1)):1/(R_(2)T_(2)) :1/(R_(3)T_(3))`
`=1/(6xx10):1/(10xx12):1/(12xx15)`
`=1/60:1/120:1/180rArr6: 3 : 2`
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