Rehana is fixing lace around a rectangular table cloth for her sister's birthday celebration.She has a 10 m roll of lace. How much lace will be needed? How much lace will be left over?
Answers
Answer:
Step-by-step explanation:
Answer:
Length of table cloth=16 cm
Breadth of table cloth =9 cm
Perimeter of table cloth (around) = 2( L+B)
=2 (16 + 9 )
= 2× 25
= 50
Hence length required 50 cm .
Rehana would need 7 meters of lace for the tablecloth.
Rehana would have 3 meters of lace left over after she finishes putting the lace around the tablecloth.
To find out how much lace is needed, you need to know the perimeter of the rectangular tablecloth.
Let's say the length of the tablecloth is l meters and the width is w meters. Then the perimeter is:
P = 2l + 2w
Rehana needs to put the lace all the way around the tablecloth, so the length of the lace needed will be equal to the perimeter of the tablecloth:
Length of lace needed = P = 2l + 2w
To find out how much lace will be left over, you need to subtract the length of the lace needed from the length of the roll:
Length of lace left over = Length of roll - Length of lace needed
Length of roll = 10 meters
If P in the formula were to be changed:
Length of lace needed = 2l + 2w
We don't know the exact dimensions of the tablecloth, but let's assume it is a standard rectangular tablecloth with dimensions of 2 meters by 1.5 meters.
Then the perimeter would be:
P = 2l + 2w = 2(2) + 2(1.5) = 4 + 3 = 7 meters
So Rehana would need 7 meters of lace for the tablecloth.
The length of lace left over would be:
Length of lace left over = Length of roll - Length of lace needed
Length of lace left over = 10 - 7 = 3 meters
Therefore, Rehana would have 3 meters of lace left over after she finishes putting the lace around the tablecloth.
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