Question

Ques no 10
आंसर क्लियर होना चाहिए

Answer 1

Step-by-step explanation:

let the sum of money be X rs .

then for compound interest

$a = p(1 + r \div 100) {}^{t}$

C I = a -p

now as per the formula a = p(1+12/100)^2

on evaluating a = p( 1+0.12)^2

so a = p (1.12)^2;

a=1.2544p

so CI = 1.2544p -p =0.2544p

Case2nd ;

$si = (p \times r \times t) \div 100$

using the above formula

SI = (p ×12 ×2)/100

SI = 0.24p ;

as per the condition

CI -SI =72

0.2544p - 0.24p =0.0144p =72 ;

p= 72÷0.0144

p = 5000.Rs

So the required sum of amount = 5000Rs