Question

semi circle, rectangle, length 150cm

Answer 1

Answer:

The perimeter of ADB is approximately 268m

Step-by-step explanation:

Given,

A rectangle of length 150m and a circle with diameter 150cm

so, radius = 150/2 = 75cm

Let O be the centre of the semicircle

thus, OB = 75cm

Here, Let D be the vertice of the rectangle between A and B

so, AD = OB = DB = 75cm

OB is perpendicular to DB

Thus, AB = (2πr)/4

πr/2 = (75π)/2

= (75 × 3.14)/2 = 235.5/2 = 117.75m

Thus the total perimeter of ADB = 117.75 + 75 + 75

= 267.75 ~ 268m

Thus the perimeter of ADB is approximately 268m

Hope you understood it........All the best

Answer 2

Answer:268

Step-by-step explanation: