Question

At whatrate per cent per annum will 600 amous
* 640 amounts to 768 in 2 years 6 months, what will 850 amo
same rate per cent per annum?​

Answer 1

Answer:

Step-by-step explanation:

S.I. = 768 - 640 = 128

TIME PERIOD = 5/2 YEARS.

THEREFORE, SI FOR ONE YEAR = 128 x 2/5 = 256/5

SO, SI FOR 1 YEAR RS. 51.2.

SO, RATE OF INTEREST (100 x SI/ P x T)= 100 x 51.2 /640 x 1 = 8%

THEN, INTEREST FOR RS. 850 for 3 yrs. = 850 x 8 x 3 / 100 = RS. 204

THEREFORE, AMOUNT = 850 + 204 = RS. 1054