वार्षि एउटा व्यक्तिले रु. 46875 को कर्जा लिएछ । यदि प्रतिवर्ष प्रति रुपैयाँ चक्रिय व्याजदर 4 पैसा भए कति वर्षमा रु. 5853 च.
25 ETSIT ? (A person took loan of Rs 46875. If the rate of compound interest is 4 paisa per rupee
year, in how many years will the compound interest be Rs 5853.) [2065 B, 067 D] Ans: 3
तार्षिक
पत्ता
Rs
200/-

3 years

Explanation:

P= Rs 46875

R= 4 Pisa per rupee per year = 4% per annum

C. I = Rs 5853

t= time (the unknown)

Given;

Amount= P(1 + R/100)^t

Amount = (P + CI)

(46875 + 5853) = 46875 (1 + 4/100)^t

1.124864 = (1 + 4/100)^ t

1.124864 = (1.04)^t

t= 3 years

pure substance: iron,copper

impure substance: water,charcoal

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.