Question

In 10 years and 8 months rs 21000 amount to rs 28000 in how much years rs 40000will amount to rs 50000 with the same as rate of interest

Answer 1

Step-by-step explanation:

Principal=21000

Amount=28000

time = 10yrs 8mnths = 128/12yrs

S.I.=Amount-Principal

S.I.=28000-21000

S.I.=7000

S.I.=PRT/100

7000=21000*128*R/100*12

7000=2240*R

7000/2240=R

Rate=3.125%

Case 2

Principal=40000

Amount=50000

S.I.=Amount-Principal

=50000-40000

=10000

S.I.=PRT/100

10000=40000*3.125*T/100

10000=1250*T

10000/1250=T

Time = 8yrs