Question

The simple interest of ₹ 2,000 is increased by
₹40 if the time is increased 4 years. Find the
rate of interest​

Answer 1

Answer:

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Step-by-step explanation:

Principal = 2000/-

Rate = R%

Time = T years

Simple Interest (S.I) = 2000×R×T/100 = 20 RT

Now, S.I increases by 40/-, when R% increases by 2, Rate becomes = (R+2)%

S.I = 2000× (R+2)×T/100

S.I = 20 RT + 40T

By this,

(20RT+40T) - 20 RT = 40

+20 RT and -20 RT will be cutted...

40T = 40

T = 40/40

T = 1 year