11. The perimeter of a rectangular park is 56 m. Its length is 16 m. Find its area and the cost of
levelling it at the rate of 2.25 per square metre.
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11. The perimeter of a rectangular park is 56 m. Its length is 16 m. Find its area and the cost of
levelling it at the rate of 2.25 per square metre.
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Answer:
12
Step-by-step explanation:
In this question the perimeter and length of the rectangular pool are given we have to find width of the pool.
( diagram )
The perimeter P of a rectangular is given by formula P=2l+2w where l is the length and w is width of rectangle.
Given that perimeter is 56 meters and length's 16 meters. Substituting values in formula,
⇒56=32+2w
subtract 32 from both sides -
⇒24=2w
w=12
width of rectangular pool is 12 meters.
Hence, the answer is 12.
Step-by-step explanation:
2(16+b) = 56m
32+2b = 56m
2b = (56-32)m
b = 12m
16×12 = 192m²