Question

sana and sara together have RS 700 . sara has three times as much as sana . how much money both of them have

Answer 1

Sana and Sara together have Rs . 700
Let the money at Sana be 'x'
Now , the money at Sara is three times of Sana's money 
⇒3×x = 3x
Now , 3x+x=Rs.700
⇒4x = Rs.700
⇒x = Rs.700/4
⇒x = Rs.175.
Therefore , 
             the money at Sana (x) = Rs.175
             the money at Sara (3x) = Rs.3×175 = Rs.525 .

Answer 2

let sana's money be `a'
then sara's money = 3a

total money = a + 3a = 700
                           4a = 700
                             a = 700/4
                             a = 175
sana's money = a = rs175
sara's money  = 3a = 3×175 = 525