Question

hyy all friends can you solve this answer don't say wrong answer warna I will report your answer.
Find the unknown quantity in each of the following:
Principal: ?
rate of interest: 12%
time period: 21/2 years
simple interest: 1200
amount: ?

Explain also​

Answer 1

Step-by-step explanation:

Simple interest = PTR/100( we know it)

let the principal be = X

=> 1200 = X× 12×21/100×2

=> 1200 = 126X/100

=> 120000 = 126X

=> X= 952.38

amount = p+si = (952.38 + 1200)Rs. =2152.38Rs.

Answer 2

Answer:

amount=principle+simple interest

a=p+1200

p=a-1200

again,

p=a×100/100+time×rate

a-1200=100a/100+126

226a-271200=100a

126a=271200

a=2152.38

p=2152.38-1200

:. p=952.38