Question

the cost of 1 kg rice is ₹42 1/2. the cost of 1kg of wheat is ₹16 3/4.find the total cost of 2kg of rice and 4kg of wheat​

Answer 1

Solution!!

$\sf Cost\:of\:1\:kg\:of\:rice=Rs\:42\dfrac{1}{2}$

$\sf Cost\:of\:1\:kg\:of\:wheat=Rs\:16\dfrac{3}{4}$

Convert the mixed fraction into improper fraction

$\sf Cost\:of\:1\:kg\:of\:rice=Rs\:\dfrac{85}{2}$

$\sf Cost\:of\:1\:kg\:of\:wheat=Rs\:\dfrac{67}{4}$

We can use the unitary method to find out the necessary value as we know the single unit.

$\sf Cost\:of\:2\:kg\:of\:rice=Rs\:\dfrac{85}{\cancel{2}}\times \cancel{2}$

$\sf Cost\:of\:2\:kg\:of\:rice=Rs\:85$

$\sf Cost\:of\:4\:kg\:of\:wheat=Rs\:\dfrac{67}{\cancel{4}}\times \cancel{4}$

$\sf Cost\:of\:4\:kg\:of\:wheat=Rs\:67$

We have to find the total cost of 2kg of rice and 4 kg of wheat. This means that the total cost is the sum of the cost of 2kg of rice and cost of 4kg of wheat.

$\sf Total\:cost=Rs\:85+Rs\:67$

$\boxed{\sf Total\:cost=Rs\:152}$