Question

If the principal amount to Rs.3550 in 4 years at the rate of interest 21/2 p.c.p.a .
Simple interest , what is the principal ?

Answer 1

Given, Amount = Rs.3550
Time = 4 years
Rate of interest = 21/2
Let the principle be P
Simple Interest = Amount - Principal
= Rs(3550 - P)
Principal = SI × 100/R × T
P = (3550 - P) × 100/21/2 × 4
P = 355000 - 100P/21 × 2
P = 355000 - 100P/42
42P = 355000
142P = 355000
P = 355000/142
P = Rs.2500
Therefore, Principal = Rs.2500

Answer 2

Answer:

2500

Step-by-step explanation:

Given, Amount = Rs.3550

Time = 4 years

Rate of interest = 21/2

Let the principle be P

Simple Interest = Amount - Principal

= Rs(3550 - P)

Principal = SI × 100/R × T

P = (3550 - P) × 100/21/2 × 4

P = 355000 - 100P/21 × 2

P = 355000 - 100P/42

42P = 355000

142P = 355000

P = 355000/142

P = Rs.2500

Therefore, Principal = Rs.2500