Question

12. At what rate per cent per annum will rs 800 amount to rs . 1000 in 5 year.​

Answer 1

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We have,

Principal (p) = Rs 800

Amount (A) = Rs 1000

Time (t) = 2 years

Now,

Simple Interest (S.I) = A - p

= Rs (1000 - 800) = Rs 200

S.I = (p×r×t) /100

=> 200 = (800×r×2)/100

=> 200 × 100 = 1600 r

=> r = 20000/1600 = 12.50

Hence,

Rate = 12.5 %

Answer 2

Answer:

We have,

Principal (p) = Rs 800

Amount (A) = Rs 1000

Time (t) = 2 years

Now,

Simple Interest (S.I) = A - p

= Rs (1000 - 800) = Rs 200

S.I = (p×r×t) /100

=> 200 = (800×r×2)/100

=> 200 × 100 = 1600 r

=> r = 20000/1600 = 12.50

Hence,

Rate = 12.5 %

Step-by-step explanation: