Question

If interest on rs x for 2 year at R℅per annum is rs 80, than intrest on rs 2x for one year atR℅ per annum is.

Answer 1

Answer:

RS 80

Step-by-step explanation:

first case

si = prt/100 = x×2×R/100 = 2xR/100 = xR/50

second case

si = prt/100 = 2x×1×R/100 = 2xR/100 = xR/50

Answer 2

Given :  interest on Rs x for 2 years at R% per annum is Rs 80

To Find :   interest on Rs 2x for one year at R% per annum

Solution:

SI = P * R * T /100

P = x

R = R

T = 2

SI = 80

=> 80 = x * R * 2 /100

=> 80 = 2xR/100

P = 2x

R = R

T = 1

SI = ?

=> SI  = 2x * R * 1 /100

=> SI = 2xR/100

=> SI = 80

interest  = Rs 80

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