Question

10 burgers cost 60 dollars. What will 15 burgers cost?

Answer 1

Hey friend, follow this answer:-

Cost of 10 burgers = 60 dollars.

Cost of 1 burgers = 60 / 10 
                            =   6 dollars

Cost of 15 burgers = 15 x 6
                               =  90 dollars.



hope it helps :)

Answer 2

10   ---------------  60
15   ---------------  ?

cross multiply 

we get 

15 x 60
-----------
    10

900/10

90 dollars