Question

the perimeter of a rectangle is 46 cm and its length is 15 M find its (1) breadth (2)area (3) diagonal

Answer 1

@
1)P=2(l+b)
46cm=2(15+b)
46cm=30+2b
(46-30)cm=2b
16cm=2b
8cm=breadth
_____________
2)Area =l×b
15×8
120cm=Area of rectangle
_____________
3)Diagonal
H²=P²+b²
H²=(15)²+(8)²
H²=289
H=17cm
Diagonal =17cm
@:-)

Answer 2

Perimeter = 46 cm
Length =15 cm

Let us assume lenght as 'l' and breadth as 'b'

(1) BREADTH

Perimeter= 2(l+b)
 46= 2(15+b)
 46=30 + 2b
 2b= 46-30
 2b= 16
 b= 8cm     
Ans- Therefore, breadth is 8cm.

Area = l×b
         =15×8
         =120cm²
Ans- Therefore, area is 120cm²

Diagonal= √l²+b²
               =√15²+8²
               =√225+64
               =√289
               =17cm
Ans- Therefore, diagonal is of 17cm.