Question

tasha takes 15 minutes to reach the school on foot from her house. if her speed is 40 metre per minute how far is her school from her house​

Answer 1

Now, area of shaded region = area of big whole square – area of small inner square – area of 4 semi-circles. ⟹Area of shaded region = 196 – 16 – 25.12 = 154.88cm2. Note: In order to solve this type of question the key is to divide the unshaded region into known shapes and then we compute its area.