Question

tha perameter of a rectangular sheet is 200 cm.if the length is 15 cm.find it's breadth.also fine the area
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Answer 1

Step-by-step explanation:

$perimeter \: of \: rec = 2(l + b) \\ \\ 2(15 + b) = 200 \\ \\ 30 + 2b = 200 \\ \\ 2b = 200 - 30 \\ \\ b = 170 \div 2 \\ \\ b = 85 \\ area \: of \: rec = lenght \: \times breadth \: \\ \\ 15 \times 85 \\ \\ 1275$

Answer 2

perimeter of a rectangular sheet=200 cm

length=15cm

breadth=?

area=?

perimeter of a rectangle=2(length+width(i.e., breadth))

P=2(l+b)

200=2(15+b)

200=30+2b

200-30=2b

170=2b

2b=170

b=170/2

b=85

breadth=85cm.

Area=length×breadth

15×85=1275

Area=1275sq cm