Question

2
If a sum of money at simple interest doubles in 6 years, it will become 4 times in:
(b)
14 years
12 years
(C)
16 years
(d)
18 years​

Answer 1

Answer:

18 years

Step-by-step explanation:

Let sum=x

We know,

S.I.=

100

PRT

SI=x

Rate=

(x×6)

(100×x)

=

3

50

%

Now sum =x, S.I=3x

Rate=

3

50

%

Time

=

x×

3

50

(100×3x)

=18 years.

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Answer 2

Answer:

18 years.

Step-by-step explanation:

Answer

Let sum=x

We know,

S.I.= PRT/100

S.I= x

Rate= (100x×) /(× x6 )

= 50/3%

Now sum =x, S.I=3x

Rate= 50/3%

Time= ( 100 x 3x ) / x 5/3

=18 years.