Sainik School Entrance Exam 2019 Solved Paper

Question : 24 of 150

Marks: +1, -0

A road roller is

350 {\cm}

long and its diameter is

84 {\cm}

. It takes 500 complete revolutions to travel the road. The area covered by it in

{\m}^2

will be

Solution:

(a) Area covered is one revolution

=2πrh

= 2×22/7×(84/2)×350

= 92400 \cm^2=9.24=4620 \m^2

.
Hence, area covered in 500 complete revolution

=500×9.24=4620 \m^2

Go to Question:

Prev Question

Next Question