Question

please give me solution of this question as soon as possible

Answer 1

for cylindrical roller
r=42cm h=120m
area covered in one revolution
=A=

$2\pi \: rh$
area covered in 1000 revolution=1000A
rectangular ground surface area=l*b
l*32=1000A
l=(1000*2*22*0.42*120)/7*32
=9900m