Question

Find the rate of interest when 800 fetches 130 as simple interest in 2 year 6 months

Answer 1

Answer:

Step-by-step explanation:

SI =PTR/100

130=800×5×R

________

100×2

130=2R

130/2=R

6.5%=R

Answer 2

Solution :

Given

principal ( P ) = Rs800

Time ( T ) = 2 years 6 months

=( 2 + 1/2 ) Years

= 5/2 years

Let rate of interest = R

simple interest (s.i ) = Rs130

We know that ,

(PTR)/100 = S.I

=> R = ( S.I × 100 )/( PT)

= ( 130 × 100 )/( 800 ×5/2 )

= ( 130 × 2 )/( 8 × 5 )

= 13/2

= 6½ %

= 6.5%

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