Question

The diameter of a roller is 84cm and its length is 120 cm. The roller takes 150 complete revolution to move once over a playground to level it. Find the area of playground in square meter

Answer 1

LENGTH OF ROLLER=12cm
RADIUS OF ROLLER=42cm
CURVED SURFACE AREA OF ROLLER=2πrh
=2*(22/7)*42*12
=3168cm
AREA OF PLAYGROUND=150*3168
=475200cm²

Answer 2

here is ur answer mate...........