Question

Please tell the answer of all.

Answer 1

Step-by-step explanation:

1)

Time = distance/speed

distance=69m

speed= 30 cm/s = 30/100m/s = 0.3 m/s

time = 69/0.3 = 2.3 s

2) area of rectangle= L*B = (23*17) cm² = 391 cm²

area of the inner square = s*s = 4.5*4.5= 20.25 cm²

area of the shaded portion= (391- 20.25) cm²= 370.75 cm 2