rs. 1200 is invested at 8% simple interest per annum . in how much time will it double itself
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Solution :
Principal ( P ) = Rs 1200
Rate of interest ( R ) = 8%
Time = T years
Amount ( A ) = 2P
= 2 × 1200
= Rs 2400
=> ( PTR )/100 = A
=> T = ( 100 × A )/( PR )
=> T = ( 100 × 2400 )/( 1200 × 8 )
= 25 years
••••
Principal ( P ) = Rs 1200
Rate of interest ( R ) = 8%
Time = T years
Amount ( A ) = 2P
= 2 × 1200
= Rs 2400
=> ( PTR )/100 = A
=> T = ( 100 × A )/( PR )
=> T = ( 100 × 2400 )/( 1200 × 8 )
= 25 years
••••
jyoti2240:
wrong ans
check the answer again .It is absolutely correct.
ans is 12 1/2 according to book
text book answer is wrong
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