25 years, 45 years
d. 5 years, 30 years
If the perimeter of a rectangle is 100 cm and its length (l) is 20. сm more than its
breadth (b), find its length and breadth.
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Step-by-step explanation:
Perimeter = 100cm
Breadth(b) = b
Length(l) = 20cm + b
Perimeter of a rectangle = 2(l+b)
100 = 2(20+b + b)
100 = 40+2b + 2b
100 = 40 + 4b
100 - 40 = 4b
60/4 = b
15 = b
Breadth = 15cm
Length = 20 +b = 20 + 15 = 35cm
Recheck:-
Perimeter of a rectangle = 2(l+b)
=> 2(35+15)
=> 2 x 50
=> 100cm
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