Q. 94.5( 187 Votes )

A road roller takes 750 complete revolutions to move once over to level a road. Find the area of the road if the diameter of a road roller is 84 cm and length is 1 m.


Answer :

Given: Diameter of road roller = 84 cm


Radius of road roller = 42 cm


Length of road roller, h = 1 m = 100 cm


Curved surface area of road roller = 2 π r h


= 2 × 22/7 × 42 × 100


= 26400 cm2


Area covered by road roller in 750 revolutions = 26400 × 750


= 1,98,00,000 cm2 or 1980 m2


the area of the road is 1980 sq. m.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Quiz | Imp. Qs on PolyhedronsQuiz | Imp. Qs on PolyhedronsQuiz | Imp. Qs on Polyhedrons38 mins
Area of PolygonsArea of PolygonsArea of Polygons41 mins
Quiz | MensurationQuiz | MensurationQuiz | Mensuration45 mins
Quiz | MensurationQuiz | MensurationQuiz | Mensuration43 mins
NCERT | Surface Area of Solid ShapesNCERT | Surface Area of Solid ShapesNCERT | Surface Area of Solid Shapes39 mins
NCERT | Imp. Qs. of MensurationNCERT | Imp. Qs. of MensurationNCERT | Imp. Qs. of Mensuration53 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses