Question

A sum of money is double in 20 years at simple interest
in how many years it will be triple

Answer 1

Answer:

sum of money doubled in 20 year mean

if p =, amount after =20

year =200, interest=100

• I=P × R × I
• 100=100 × R ×20
• 100
• 100=R
• 20

now 4 time means if P = 100, A = 200 means interest should be 300 T=?,

=I=P ×R ×T

100

=300=100 ×5 × T

100

in 60 years.

(alternate method)

in 20 year double means if P=100,A=200,I=100

now 4 time means if P=1000,A=400,I=300

time for I 100=20 year

time for I=300=20×300

100

=60 years

Answer 2

Answer:

= 60 years

Step-by-step explanation:

ya answer ha mark my answer as brilliant