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Question

The vertical handle bars in a bus are cylindrical in shape. If each bar has a circular base of radius 5cm and height 5 m, how much iron would be required to build 14 such bars?(Take π = 227)   [4 MARKS]


Solution

Concept: 1 Mark
Formula: 1 Mark
Application: 2 Marks

Since, the iron occupies the entire space of the bar, we need to find the volume of the cylinders.

Radius of base of a cylinder =5cm=5×102m

Height of the cylindrical pillar =5m

Volume of each cylinder
=πr2h

=2275×10225

=0.03926m3


Therefore, volume of 14 bars = 14 . volume of each cylinder

=0.549m3.

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