Question

if 12masks cost 60 ruppes who many such masks can one buy for 90 rupees ?​

Answer 1

Answer:

18 mask

in 60 rs 12 mask bought

in 1 rs 1/5 mask bought

in 90rs mask bought=1/5 * 90

=18 masks

Answer 2

Cost of 12 masks=Rs.60

Cost of 1 mask=60/13=Rs.5

Masks in Rs.90=90/5=18 masks