Question

If the cost of 5 bars of a soap is Rs 30, then the cost of one dozen bars is ?​

Answer 1

$\huge\underline\mathrm\color{seagreen}{Answer}$

Given :-

5 bars of soap costs Rs 30

To find :-

Cost of one dozen of bars of soap

Solution :-

We know

1 dozen bar of soaps = 12 bars of 5 soap

Bar of - Rs

soap

$5 \: \: \: - \: \: \: 30$

$12 \: \: \: - \: \: \: ?$

Therefore Cost of one dozen of bars of soap ,

$\large{= \frac{12 \times 30}{5} }$

$= 12 \times 6$

$= \: \: Rs\: \: 72$

Answer 2

Given: Cost of 5 bars of soap = Rs. 30

To find: Cost of one dozen bars

Solution: According to the given question,

Cost of 5 bars of soap = Rs. 30

Using Unitary method:

Cost of 1 bar of soap = Cost of 5 bars/5

                                   = 30/5 = Rs. 6

One dozen bars = 12 bars of soap

Cost of 12 bars of soap = Cost of one bar x 12

                                      = 6 x 12 = Rs. 72

Hence, the cost of one dozen bars is Rs. 72