Question
At what rate of simple interest per annum will a sum become $7/4$ of itself in 4 years ?
Answer: Option D
Answer: (d)Let the principal be xPrincipal + SI = ${7x}/4$SI = ${7x}/4 - x = {3x}/4$Rate = ${SI × 100}/\text"Principal × Time"$= ${3x × 100}/{4 × x × 4} = 18{3}/4%$Using Rule 3,R = ${(7/4 - 1)}/4 × 100%$= $3/16$ × 100%= $75/4% = 18{3}/4%$
Was this answer helpful ?
Answer: (d)Let the principal be xPrincipal + SI = ${7x}/4$SI = ${7x}/4 - x = {3x}/4$Rate = ${SI × 100}/\text"Principal × Time"$= ${3x × 100}/{4 × x × 4} = 18{3}/4%$Using Rule 3,R = ${(7/4 - 1)}/4 × 100%$= $3/16$ × 100%= $75/4% = 18{3}/4%$
Was this answer helpful ?
More Questions on This Topic :
Latest Videos
Latest Test Papers
Submit Solution