Question

A dozen notebook cost Rs.180.
a)What is the cost of 8 such notebooks?
b)How many notebooks will cost Rs.225?
Please answer my question this is related to the Unitary Method

Answer 1

Answer:

a.128

b. 15

Step-by-step explanation:

a. 12/180×8=128

Answer 2

Answer:

a) 120 rs

b) 15 books

Step-by-step explanation:

$\blue{ \bf{ \underline{QUESTION \: no \: - 1 : - }}}$

a)What is the cost of 8 such notebooks?

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$\boxed{ \bold{ \huge{Given}}}$

• A dozen Notebook cost 180 rs /-

$\boxed{ \bold{ \huge{to \: find}}}$

• Cost of 8 Notebooks

$\star{ \pink{ \large{ \sf{ \underline{ \underline{Solution : - }}}}}}$

We Know ,

$\large{ \sf{ cost \: of \: 1 \: Notebook \: = \cancel \frac{180}{12} \: =15 \: rs }}$

${ \therefore\large{ \sf{ Cost \: of \: 8 \: notebook \: = 15\times 8}}}$

$\large{ \sf{ Cost \: of \: 8 \: Notebook \: = \boxed{ \red{ \mathfrak{120\: rs}}}}}$

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$\blue{ \bf{ \underline{QUESTION \: no \: - 2 : - }}}$

b)How many notebooks will cost Rs.225?

_________________________

$\boxed{ \bold{ \huge{Given}}}$

• A dozen of Notebook 180 rs/-

$\boxed{ \bold{ \huge{to \: find}}}$

• How Many notebooks will cost 225 rs/-

$\star{ \pink{ \large{ \sf{ \underline{ \underline{Solution : - }}}}}}$

$\large{ \sf{ Cost \: of \: 1 \: notebook \: = \cancel \frac{180}{12} \: =15 \: rs }}$

$\large{ \sf{ Number \: of \: books \: that \: will \: cost \: 225 = \cancel\frac{225}{15}}}$

$\large{ \sf{ Number \: of \: books \: that \: will \: cost \: 225 = {\boxed{\red{ \mathfrak{15 \: books}}}}}}$

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