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A sum of 1750 is divided into two pats s...

A sum of 1750 is divided into two pats such that the interest on the first pat at a 8% simple interest per annum and that on the other part at 6% simple interest per annum are equal. The interest on each part(in rupee) is(रु1750 की राशि दो भागो में इस प्रकार विभाजित की जाती है कि पहले भाग पर 8 % की दर से वार्षिक साधारण ब्याज और दूसरे भाग पर 6% की दर से वार्षिक साधारण ब्याज बराबर है तब प्रत्येक भाग पर ब्याज कितना होगा )

A

60

B

65

C

70

D

40

लिखित उत्तर

Verified by Experts

The correct Answer is:
A

(a) Principa(मूलधन)=1750
Let the first part(माना की पहला भाग) =x
Hence second part(इसलिए दूसरा भाग)=(1750-x)
According to the question(प्रशानुसार)
`x xx(8)/(100)xx1=(1750-x)xx(6)/(100)=1`
`4x=5250-3x`
7x=5250-3x
x=750
First part (पहला भाग) =750
Second part(दूसरा भाग) =(1750-750)=1000
Required Interest(अभीस्ट बियाज) =`750xx(8)/(100)=60`
Alternate /(वैकल्पिक विधि)
Note:- In such type of question to save your valuable time follow the given below method (इस प्रकार के प्रशनो बहुमूल्य समय के बचत के लिए आप नीचे दी गयी विधि का प्रयोग कर सकते है)
Let, the Principle (माना की मूलधन) =100 units in both cases(दोनों स्थियो में)

Note:- Interest is same in both cases
According to the question(प्रशानुसार)
700 units = ₹ 1750
1 unit = ₹ `1750/700`
24 units = ₹ `1750/700xx24= ₹ 60`
Hence, required interest (अभीस्ट बियाज) = ₹ 60
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