The area of a rectangular playground is420 sq.m .If it's length is increased by 7cm and breath is decreased by 5 m, the area remains the same. Find the length and breath of the playground
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Step-by-step explanation:
Hey,
Initial area = 420
=>l.b=420 ........... (i)
New length = l+7
New breadth = b-5
New area = (l+7)(b-5)
ATQ
area remains unchanged
=>(l+7)(b-5) = 420
=>l.b -5l+7b-35 = 420
=>420 -5l+7b-35 = 420
=> -5l+7b = 35 ............. (ii)
Solve equation (i) and (ii)
you will get the required length and breadth.
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