Happy RM day to all plz solve this fast with full explanation
Answers
Hey there ARMY!
here's your answer:
I used the formula of rectangle ⤵️
*Things to remember :-
Area = lb or l*b
Perimeter = 2(l+b)
(i) Given:
l = 12m
b = 8m
To find: Area & Perimeter
Area = lb
=> 12*8
=> 96m²
Perimeter = 2(l+b)
=> 2(12+8)
=> 2(20)
=> 40m
Hence, Area = 96m²
Perimeter = 40m
(ii) Given:
Area = 90cm²
l = 15cm
To find: b & perimeter
=> Area = lb
=> 90 = 15*b
=> 90/15 = b
therefore, b = 6cm
Perimeter = 2(l+b)
=> 2(15+6)
=> 2(21)
=> 42cm
Hence, b = 6cm
Perimeter = 42cm
(iii) Given:
b = 50mm
Perimeter = 300mm
To find: l & Area
=> Perimeter = 2(l+b)
=> 300 = 2(l+50)
=> 300/2 = l + 50
=> 150 = l + 50
=> 150 - 50 = l
=> 100 = l
therefore, l = 100mm
Area = lb
=> 100*50
=> 5000mm²
Hence, l = 100mm
Area = 5000mm²
(iv) Given:
l = 12cm
Perimeter = 44cm
To find: b & Area
=> Perimeter = 2(l+b)
=> 44 = 2(12+b)
=> 44/2 = 12 + b
=> 22 = 12 + b
=> 22 - 12 = b
=> 10 = b
therefore, b = 10cm
Area = lb
=> 12*10
=>120cm²
Hence, Perimeter = 10cm
Area =120cm²
I hope it will help you
....✿
i) 96 m^2, 40 m
ii) 6 cm, 42 cm
iii) 100 mm, 5000 mm^2
iv) 10 cm, 120 cm^2