Question

6. Find the area or (Take it = 221 7. The diameter of a wheel of a bus is 90 cm which makes 315 revolutions per minut Determine its speed in kilometres per hour. (Use t = 22/7] 2 and one of the diagonal is 16 cm. Find​

Answer 1

Step-by-step explanation:

Diameter of wheel =90cm

⇒ Radius of wheel (r)= 90/2=45cm

⇒ Distance covered in 1 revolution =2πr

⇒ Distance covered in 1 revolution =2× 22/7

×45= 1980/7 cm

⇒ Distance covered in 315 revolutions =

1980/7×315=89100cm=891m

⇒ Hence, the speed is 891m/min=

1000/891×60km/hr=53.46km/hr