Question

A worker earns 18000 rupees in 15 months.how much he will earn in 7 months

Answer 1

solve it by unitary method
money earned by worker in 15 months is 18000
so money earned in 1 month = 1200
money earned in 7 months = 1200×7=8400 answer

Answer 2

amount of money earned per month by the worker is 18000/15= 1200/-

then he earns 1200*7=8400/- in 7 months