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Question

In a gym, in one exercise you have to continuously toss solid cylindrical dumbbells and catch them. Cylindrical dumbbells are of length 1 m and base diameter also 1 m. If density of the material used is 4 kg per m3, then the weight tossed is ___.
  1. 3.14 kg
  2. 4πkg
  3. 12.56 kg
  4. π/2

A
3.14 kg
B
12.56 kg
C
4πkg
D
π/2
Solution
Verified by Toppr

Length of cylinder= 1 m
diameter = 1 m. radius=0.5m
Volume of the cylinder=
V=Πr2h
V=Π0.521=0.79m3
density=4 kg per m3
Mass= Volume*density=4*0.79=3.14Kg
Answer (A) 3.14 kg

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