Question

(4) 36 km/h km/h (3) 30 km/h 69. Evaluate the perimeter of the figure given below to one decimal place. 20m 2m 2m 2m 2m 10 m 2m 2m 2m (4) 57.9 m 2m (2) 56.6 m (1) 56.0 m (3) 57.2 m​

Answer 1

Answer:

Correct option is

B

56.6 m

The corners are quadrants, i.e.,

41×2×π×2=π

For 4 corners, we have peri-meterof quadrants 4π

Perimeter of horizontal portions =2(20−4)=32 m

Perimeter of vertical portions =2(10−4)=12 m

Hence total perimeter =44+4π

=44+788=7308+88

=56.57≈56.6m