1.

If The Length Of A Rectangle Is Increased By 20% And It’s Breadth Is Decreased By 20% Then It Area?

Answer»

LET length = X METRES and breadth = y metres, then area =(XY

New length =(120/100x)m = 6x/5 m 

New breadth =(80/100 y)m 

New area =(6x/5 x 4y/5)m2 = (24/25 xy)m2 

Decreased in area =(xy – 24/25 xy)m2= xy/25 m2

Decreased % =(xy/25 x 1/xy x 100)% = 4%.

Let length = x metres and breadth = y metres, then area =(xy) 

New length =(120/100x)m = 6x/5 m 

New breadth =(80/100 y)m 

New area =(6x/5 x 4y/5)m2 = (24/25 xy)m2 

Decreased in area =(xy – 24/25 xy)m2= xy/25 m2

Decreased % =(xy/25 x 1/xy x 100)% = 4%.



Discussion

No Comment Found