Question

the cost of 18 rulers is rupees 117 find the cost of a dozen rulers​

Answer 1

Answer:

rupees 78

Step-by-step explanation:

let us assume the cost of dozen rulers as x

therefore

18 rulers = rupees 117

12 rulers =  x

cross multiply

therefore

18*x=117*12

x= 117*12/18

x= 78