Question

a worker earn rupees 1800 in 15 month in how many months will he earn rupees 3600​

Answer 1

1 month = 1800/15
(1800/15)X3600

Answer 2

By the use of unitary method

1800 15

3600 x

cross multiply

1800x = 1500× 3600

x = 1500 × 3600/ 1800

x = 15×2

x= 30