Question

Samantha has 30 coins, consisng of 25 paise and 10 paise, which total Rs. 5.70. How many of each does she have?​

Answer 1

Answer:

There are 18 , 25-paise coins and

                12 , 10-paise coins

Step-by-step explanation:

let the no. of 25paise coins =  x

and no. of 10  paise coins = y

given, x + y = 30   -------------- (1)

=> y = 30-x  ----------(2)

also given,      25x + 10y = 570  (paise)

=> 25x + 10(30-x) = 570

=> 25x + 300 - 10x = 570

=> 15x = 570-300

=> 15x = 270

=> x = 270/15

=> x = 18

so, (2) => y = 30-18

          => y = 12

verification,

25(18) + 10(12)

= 450 + 120

= 570 paise

= Rs. 5.70

hence verified