Question

5. 4 erasers are purchased for rs.10. Find the cost of on dozen erasers.

Answer 1

Cost of 1 eraser = 10/4=5/2=2.5
Cost of dozen of erasers =2.5×12= 30

HOPE IT HELPS

Answer 2

cost of 4 erasers=Rs10
Cost of 1 eraser=10/4=Rs2.5
Now,
Cost of dozen(12)erasers=2.5×12=Rs.30