Question

4: the diameter of each wheel of a truck is 140 cm, if each wheel rotates 300 times per minute then the speed of the truck (in km/hr) (take pie=22

Answer 1

thanks again for your help

Answer 2

Step-by-step explanation:

given,

diameter=140cm

radius=diameter/2=140/2=70cm

now,

the wheel rotate in 1min =300times

in 60 min wheel rotate

=300*60

=18000 times

circumference of wheel =2*pi*radius=2*22/7*70=440

speed of truck=distance/time

=440*18000/1000*100

=79.2km/hr

so,the speed of truck is 79.2km/hr