Question

A
clasroom board is 60cm long
and 20cm wide. Find the perimeter
of black board
​

Answer 1

Answer:

To find perimeter of an blackboard

Perimeter of a rectangle = 2 (l+b)

= 2×(60+20)

= 2× 80

= 160

So the perimeter of blackboard is 160

Answer 2

Shape of classroom board - rectangle

Perimeter of rectangle = 2( L + B )

Length L = 60 cm

Breadth B = 20 cm

Perimeter = 2( 60 + 20 )

= 2( 80 )

= 160 cm

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