Question

please solve this sum using formula​

Answer 1

Answer:

P = 16,000

Step-by-step explanation:

Let the sum or principal be = P

C.I = 4240

n = 2 years

r1 = 10% and r2 = 15%

A = P ( 1+r1/100 ) (1+r2/100 )

A = P ( 1 + 10/100 ) ( 1 + 15/100 )

A = P ( 11/10 ) ( 23/20 )

A = P ( 253/200 )

Also we know that,

C.I = A - P

4240 = P ( 253/200 ) - P

4240 = P ( 53/200 )

P = 16,000

Therefore the sum is 16,000 .