at what rate%p.a. s.i will the interest on rs.4200 in 5 year be 3/4 of the s.i. on rs. 6400 in 7/2 years at 15% p.a ?
jagan14:
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SI of rs. 6400 in 7/2 years at 15% pa =
(6400 × 7/2 × 15) / 100 = 3360
Now, Let the required % be x%.
Then SI of rs. 4200 in 5 yrs at x% =
(4200 × x × 5)/100 = 210x
Now as we have been given, 210x = (3/4) × 3360 . So x = (3/4 × 3360)/210 = 12
So we get that x = 12 yrs. Hence ans is 12
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(6400 × 7/2 × 15) / 100 = 3360
Now, Let the required % be x%.
Then SI of rs. 4200 in 5 yrs at x% =
(4200 × x × 5)/100 = 210x
Now as we have been given, 210x = (3/4) × 3360 . So x = (3/4 × 3360)/210 = 12
So we get that x = 12 yrs. Hence ans is 12
Pls mark as brainliest pls.
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