Question

A blackboard measures 4m 50cm by 1m 75cm. What is the perimeter of
the black board?​

Answer 1

Answer:

1250 cm

Step-by-step explanation:

perimeter=2(a+b)

a=4 m 50 cm

=450 cm

b=1 m 75 cm

=175 cm

p=2(450+175)cm

=2(625) cm

=1250 cm

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Answer 2

Answer:

1250cm

Step-by-step explanation:

$4m \: 50cm = 400cm + 50cm = 450cm \\ 1m \: 75cm = 100m + 75cm = 175cm \\ \\ given - \\ length - 450cm \\ breadth - 175cm \\ \\ solve - \\ perimeter \: of \: blackboard = 2(l + b) \\ = 2(450 + 175) \\ = 2 \times 625 \\ = 1250cm$