Question

19. The interest on Rs 350/- at certain rate for certain time is Rs 70)- Then, what is the interest on Rs 1050/- at half of the previous rate and for double the previous time? 1) Rs 70/- 2) Rs 105/- 3) R$ 2107 R280/ 20. In finding the interest if the time is 73 days, then to be taken as 1 1) 73 days 2 Near 3) 4) year​

Answer 1

Answer:

Step-by-step explanation:

Simple Interest, S.I. = Rs. 1260 =  

100

PR×2

​  

=    

50

PR

​  

         -(i)

Compound Interest, C.I. = Amount(A) - Principle(P)

=P(1+  

100

R

​  

)  

2

- P = PR(R/10000+1/50)=Rs.1323         -(ii)

Dividing (ii) by (I),

200

R

​  

+1 =  

1260

1323

​  

 

⇒Rate,R=10%p.a.

Now,  

100

PRT

​  

=1260

⇒  

100

P×10×2

​  

=1260

⇒ Principal or Sum , P = Rs.6,300

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