Question

a sum amount to 21,600 in 8 years at 10℅ per annum simple interest. in what time will be the sum double itself at the same rate of interest​

Answer 1

Let R=

100

625

. According to the question,

Amount=2(Principle)

A=2P

S.I.=A−P

=2P−P

=P

S.I.=

100

P×R×T

P=

100×100

P×625×T

T=

P×625

P×100×100

T=16years

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