Question

the cost of a notebook is ₹ 13/4 less than the cost of a register.if the cost of a register is 78/5,find the cost of the notebook.​

Answer 1

Answer:

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Step-by-step explanation:

so let the cost of notebook be x rs and that of register be y rs

so here y=78/5 rs

according to given condition

x=y-13/4

=78/5-13/4

=(78×4)-(13×5)÷20

=312-65÷20

=247/20 Rs

Answer 2

Given

• Cost of register = 78/5.
• Cost of notebook is ₹ 13/4 less than the cost of a register.

According to Question

$\: \: \: \: \: \implies\sf \: x = \dfrac{78}{5} - \dfrac{13}{4}$

${ \: \: \: \: \: \implies\sf \: x = \dfrac{4(75) - 5(13)}{5 \times 4} }$

${ \: \: \: \: \: \implies\sf \: x = \dfrac{312 - 65}{5 \times 4} }$

${ \: \: \: \: \: \implies\sf \: x = \dfrac{247}{20} }$

${ \: \: \: \: \: \implies\sf \: x = 12.35 }$

$\\ \\ \\ \\ \sf{Cost \: \: of \: \: notebook = \bf₹ 12.35}$