Question

Raju saves Rs.50 in the first month then he increases his saving by Rs.100 in successive months .How much amount was with him after one year ? ​

Answer 1

Answer:

Correct answers is

Step-by-step explanation:

Correct option is

D

21 months

⇒400+(n−2)[200+(n−3)20]=11040

⇒(n−2)[200+20n−60]=10640

⇒(n−2)(20n+140)=10640

⇒20(n+7)(n−2)=10640

⇒n2+5n−14=532

⇒n2+5n−546=0

⇒(n+26)(n−21)=0

⇒n=21

So, total time =21 months.

Answer 2

Answer:

6650 Rs

Step-by-step explanation:

add 50+100+200+300+400+500+600+700+800+900+1000+1100