A road roller is of diameter 80cms and length 1.2m.what is the area of ground levelled,as it rolls once?
Answers
Answered by
1
Answer:
30171.4
Step-by-step explanation:
Area rolled will be = (circumference of circle * length of roller)
= 2*π*40 * 120 = 9600π or 30171.4
Answered by
2
Step-by-step explanation:
Road roller will be in the shape of Cylinder.
Given: d=80cm=0.8m. h=l=1.2m.
r=d/2=0.8/2=0.4m.
Area of ground levelled it rolls once = LSA of cylinder.
LSA of cylinder=2πrh
=2(22/7)(1.2)(0.4)
=21.12/7
=3.01m².
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