Question

A photo frame of 34 cm long and 18 cm wide is edged with a piece of wood of 2cm wide find the cost of edging at the rate of rs 5 per square cm

Answer 1

so effective area of wood required= 34×18 -30×14
hence cost of edging = (above calculation)×5

Answer 2

The cost of edging at the rate of Rs.5 per square cm is Rs.960.

Step-by-step explanation:

Given : A photo frame of 34 cm long and 18 cm wide is edged with a piece of wood of 2 cm wide.

To find : The cost of edging at the rate of rs 5 per square cm ?

Solution :

The length of frame = 34 cm

The breadth of frame = 18 cm

The area of the frame is $A= l\times b$

$A=34\times 18$

$A=612\ cm^2$

A piece of wood of 2 cm wide.

So, length became 34-2-2=30 cm

Breadth became 18-2-2=14 cm

The inside area is

$A_i=30\times 14$

$A_i=420\ cm^2$

Area of Edging = Area of frame - Area of inside frame

Area of Edging = 612-420

Area of Edging = 192 cm²

The cost of edging at the rate of rs 5 per square cm.

$Cost=5\times192$

$Cost=Rs.960$

Therefore, the cost of edging at the rate of Rs.5 per square cm is Rs.960.

#Learn more

Find the area of a path 2 m wide laid inside along the boundary of a rectangular park of dimension 100m * 60m. Find the cost of gravelling it at the rate of Rs 30 per square metre.

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