Question

a kg of sugar costs rs.49.50. but the supplier gives 10 grams less for every kg he sells. what is the approximate actual cost to the supplier (per kg)?

Answer 1

A kilogram of sugar costs Rs. 49.50.

But the supplier gives 10 grams less for every kilogram he sells.

So,

In each kilogram there is 1000 grams.

1 kilogram of sugar = 1000 grams of sugar

or 1000 grams of sugar = 1 kilogram

Using the Unitary method, we can find the cost of each gram of sugar.

Now,

1000 grams of sugar costs Rs 49.50

So, each gram of sugar will cost:

$\frac{49.50}{1000} =0.0495$ rupees.

He gives 10 grams less for every kg.

So he saves:

$10 \times 0.0495=0.495$ rupees

Therefore, the approximate actual cost to the supplier for each kilogram of sugar is $49.50-0.495=49.005 \approx49.00$ Rupees.

Answer 2

Given:

A kg of sugar costs rs.49.50. but the supplier gives 10 grams less for every kg he sells.

To find :

what is the approximate actual cost to the supplier (per kg)?

Solution :

Kg of sugar is Rs 49.50

1 kg = 1000 grams

Finding the cost of 1 gram -

1000 grams = Rs 49.50

1 gram = 49.50 ÷ 1000

1 gram = 0.0495.

Finding the grams sold as 1 kg:

Given that supplier gave 10 grams less for every kg he sold -

So, 1000 - 10 = 990 grams

Finding the cost of 990 grams-

1 gram = 0.0495

990 grams = 990 x 0.0495 = 49.005 (approximately 49)

Hence, the Approximately actual cost of sugar per kg is Rs 49.