Math, asked by pratikraaj029, 6 months ago

13. A certain sum is invested for a certain time period. It amounts Rs 1000
at 25% per annum. But when invested at 10% per annum, it amounts to
Rs. 500. Find the time.
एक निश्चित समयावधि के लिए एक निश्चित राशि का निवेश किया जाता है। यह राशि 1000
25% प्रतिवर्ष है। लेकिन जब 10% प्रति वर्ष की दर से निवेश किया जातानी 500 रुपये
तक होता है। समय ज्ञात करें।
(a) 40years (b) 20years
(c) 25 yearsz (d) 30 years​

Answers

Answered by Itzgoldenking
0

Step-by-step explanation:

Let the certain sum be S and time be t years

According to question

S+S×10×t=600 .....(1)

S+S×5×t=400 .....(2)

From (1)

S=

(1+10t)

600

.....(3)

From (2)

S(1+5t)=400

(1+10t)

600

(1+5t)=400

Solving we get t=0.2 years

mate put ur values in stead of that and mark me as the brainliest

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