RRB Paramedical Staff Nurse Model Paper 6

Let slant height & height of cone be l & h respectively And, length & breadth of rectangle be L & B respectively
ATQ
L = l & h = B
2(B+9+B)=98
2B+9=49
B=20cm=h
L=l=20+9=29 cm
Radius of cone =√292−202
=√841−400
=21cm
Radius of cylindrical vessel =‌

21

2

=10.5cm
Height of cylindrical vessel = 20 cm
Volume of cylindrical vessel =‌

22

7

×10.5×10.5×20
=6930cm3
Let thickness of discs be x cm
‌

22

7

×10.5×10.5×x×25=6930
x=0.8cm