Question

the breadth of a rectangular hall is 10 less than its length if the perimeter of the hall is 420 metre find its length and breadth

Answer 1

Steps For the Answers:-

=) Let the length be 'x'

=) Breadth= x-10

=) Perimeter= 420 m

=) Length and Breadth=

=) 2(l+b)= perimeter

=) 2( 2x-10 )= 420 m

=) 4x-20= 420m

=) 4x=440

x= 110

ANSWERS :-

Length= 110m

Breadth = x-10 = 100m

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Answer 2

Answer:

l=110 b=100

Step-by-step explanation:

p=420

find l and b

b=l-10

l=b+10

here l=p/2-b

l=210-b

b+10=210-b

b+b=210-10

2b=200

b=100

l=b+10 then l=110