Question

There is a rectangular garden whose length and width is 60m x 20m. there is a walkway of uniform width around garden. the area of the walkway is 516m. find the width of the walkway

Answer 1

heya ❕ here's your answer
hope it helps you
SOLUTION :

Area of Garden = 60*20 = 1200 sq m.
Total Area of garden and walkway = 1200+516= 1716 sq m.
Let assume width of walk way be x
So (60+2x)(20+2x) = 1716
Or x = 3, -43
3 is correct answer
Since 3 is positive.
hope it helps you

Answer 2

let the width of rectangle be x

so the length & breath is increased by 2x(draw on a paper

then only u'll understand)

so new total area along with walkway is (60+2x)*(20+2x)

so (60+2x)*(20+2x)-60*20=516

=>(60+2x)*(20+2x)=1716

=>(30+x)*(10+x)=429=33*13

=>x=3  ans