Question

A worker earns Rs.18000 in 15 months.
a)How much will the worker earn in 7 months.
b) in how many months will he earn Rs.3600?

Answer 1

worker earns Rs 18000 in 15 months
Rs earned in one month=18000/15
=1200 Rs
a)Total Rs earned in 7 months
7×1200
=8400 Rs
b)3600Rs will be earned in
3600/1200
=3
it will take 3 months him to earn 3600 Rs

Answer 2

Given,

A worker earns Rs.18000 in 15 months.

To Find,

a) How much will the worker earn in 7 months?

b) In how many months will he earn Rs.3600?

Solution,

We can solve the question as follows:

It is given that a worker earns Rs. 18000 in 15 months.

a) How much will the worker earn in 7 months?

$Amount\: of\: money\: earned\: in\: 15\: months = Rs.\: 18000$

Then, the amount of money earned by the worker in 1 month will be:

$Amount\: of\: money\: earned\: in\: 1\: month = \frac{18000}{15}$

                                                           $= Rs.\: 1200$

Therefore, the money earned by the worker in 7 months is:

$Amount\: of\: money\: earned\: in\: 7\: months = 1200*7 = Rs.\: 8400$

b)  In how many months will he earn Rs.3600?

$Rs.\: 18000\: is\: earned\: by\: the\: worker\: in = 15\: months$

Then, Rs. 1 will be earned by the worker in:

$Rs.\: 1\: is\: earned\: by\: the\: worker\: in = \frac{15}{18000}\: months$

Therefore, Rs. 3600 will be earned in:

$Rs.\: 3600\: is\: earned\: by\: the\: worker\: in = \frac{15}{18000}*3600$

                                                       $= \frac{15}{5} = 3\: months$

Hence, a) The worker will earn Rs. 8400 in 7 months. b) he will earn Rs. 3600 in 3 months.