Question

An electronic watch is sold for Rs 840 at a profit of Rs.90.find its cost price and the profit per cent.

Answer 1

Answer:

12%

Step-by-step explanation:

Selling Price Of Watch = Rs 840

Profit = Rs 90

To Find Cost Price :

The Formula applied for finding Cost Price When Selling Price And Profit are Given is :

${\boxed{\tt{Selling\:Price\: - \: Profit}}}$

$\implies$ Rs 840 - Rs 90

Cost Price = ${\boxed{\tt{Rs\:750}}}$

Profit %

$\implies \: \sf \dfrac{Profit}{ \: C.P} \times 100$

$\implies \: \dfrac{90}{ 75 \cancel0} \times 10 \cancel0$

$\implies \: \cancel \dfrac{900}{75}$

12%

Answer 2

$\bold{\underline{\underline{Answer:}}}$

Cost Price of electronic watch is ₹ 750

Profit percent is 12%

$\bold{\underline{\underline{Step\:by\:step\:explanation:}}}$

Given :

• An electronic watch is sold for Rs 840
• Profit = ₹ 90

To find :

• Cost price
• Profit %

Solution :

To find the cost price :-

We will calculate the difference between the selling price and profit.

$\bold{Profit\:=\:Selling\:price\:-\:Cost\:price}$

Block in the morning,

$\rightarrow$ $\bold{90=840-Cost\:price}$

$\rightarrow$ $\bold{90=840-Cost\:price}$

$\rightarrow$ $\bold{Cost\:price\:=\:840-90}$

$\rightarrow$ $\bold{Cost\:price\:=\:750}$

•°• Cost price of the electronic watch is ₹ 750.

Profit percent :-

We have the formula for calculating the profit per cent.

Formula :-

$\bold{\boxed{\red{\rm{\dfrac{Profit}{Cost\:price}\times\:100}}}}$

Block in the values,

$\rightarrow$$\bold{\dfrac{90}{750}\times\:100}$

$\rightarrow$$\bold{\dfrac{9}{75}\times\:100}$

$\rightarrow$$\bold{\dfrac{900}{75}}$

$\rightarrow$$\bold{12}$ %

•°• Profit percent = 12