Question

how many times a wheelchair of radius 20 cm was must rotate to go 252 cm​

Answer 1

Answer:

2

Step-by-step explanation:

Let wheelchair must be rotate 'n' times of its circumference.

Radius of wheelchair=20cm and

Total distance=252cm

∴ Distance covered by wheelchair=n×circumference of wheelchair

⇒252=n×2πr

⇒252=n×2×22/7×20

⇒n= (252×7)/(2×22×20)

⇒n = 1764/880

⇒n=2.0045 revolutions.

⇒n ≈ 2 revolutions

Thus, wheelchair must rotate 2 times to go 252 cm.

Answer 2

Answer:

In the given figure ZACB 60 what is the measure of ZADB Give reason