Question

a roller 1.5 m long has diameter of 70 cm how many revolutions will it take to reach level a playground measuring 50 M and 33 m

Answer 1

C.S.A of roller =2πrh = 2×22/7×1.5×0.7

$2.2m {}^{2}$
Area of playground =L×B=50×33=
$1650m {}^{2}$
No. of revolutions =1650÷2.2
=750 revolutions