Question

dis r problem sums plz explain ot properly...

Answer 1

1)

given p = 100 cm and l = 30 cm

perimeter = 2(l+b)

100 = 2(30+b)

100= 60+b

b= 100 - 60

b = 40.

so , breadth = 40 cm .

area = length x breadth = 60 x 40 = 2400 cm.^2

2)

given l = 120 m and b = 80 m

area 120 x 80 = 960 m

given per metre cost is ₹2.

960 m = 960 x 2 = ₹1920.