Question

If the cost of 7meterof cloth is rupees 1470,find the cost of 5meter of cloth.





I want mathod correct for exam

Answer 1

$\textbf{\underline{\underline{Answer :-}}}$

$\text{The cost of 5 m cloth is Rs.1050}$

$\textbf{\underline{\underline{Explanation :-}}}$

$\textsf{\underline{\underline{Given :}}}$

Length of the cloth = 7 m

Cost of the 7 m cloth = Rs.1470

$\textsf{\underline{\underline{To find :}}}$

The cost of 5 meter of cloth

$\textsf{\underline{\underline{Solution :}}}$

$\textbf{\large{\underline{Method I}}}$

We can find the answer by Proportion :

Consider the cost of 5 m cloth as x

So, Proportion =

$\star$ 7 : 1470 : : 5 : x

$\rightarrow$Mean terms = 1450 and 5.

$\rightarrow$ Extreme terms = 7 and x

As we know :

$\tt{Mean \times Mean = Extreme \times Extreme}$

$\sf{\implies1450 \times 5 = 7 \times x}$

$\sf{\implies7350 = 7x}$

$\sf{\implies \: x = \dfrac{7350}{7}}$

$\sf{\implies \: x = 1050}$

${\boxed{\bigstar{\sf\:{x = 1050}}}}$

The cost of 5 m cloth = Rs.1050

$\therefore$$\text{The cost of 5 m cloth is Rs.1050}$

$\textbf{\large{\underline{Method II}}}$

We can find the answer by Unitary Method.

Cost of one 1 meter cloth =

$\sf{\implies1470 \div 7}$

$\sf{\implies210}$

${\boxed{\bigstar{\sf\:{Cost \: of \: 1m\: = rs.210}}}}$

As we got the cost of 1 m cloth we can find the cost of 5 m cloth.

Cost of 5 meter =

$\sf{\implies210 \times 5}$

$\sf{\implies1050}$

${\boxed{\bigstar{\sf\:{Cost \: of \: 5m\: = rs.1050}}}}$

$\therefore$$\text{The cost of 5 m cloth is Rs.1050}$

Answer 2

Answer:

Rs.1050

Step-by-step explanation:

One meter = 210

5 meter = 210 × 5

=> Rs.1050