Question

the Area of a rectangle is 460cm² if the length is 15% more than the breadth, what is the breadth of the rectangle

Answer 1

let the breadth be x cm
then length = 115% of x
area = l x b
460 = 115/100x * x
460 *100/115 = x^2
400 = x^2
x = root of 400
   = 20
b = 20 cm
l = 115/100 * 20 = 23 cm 

Answer 2

Area = 460cmsq = l×b
let the breadth be x cm
then length = x+15%of x
= 460^2=(x+15×/100)×x
=460^2= 115x/100
so 460 ×100/115
= 400
now we find that 400 is which no. square root
=20cm
so breadth = 20cm
length = 20+15/100×20 = 23cm
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