Q20. The diameter of a sphere is measured using a vernier caliper whose 9 divisions of main scale are equal to 10 divisions of vernier scale. The shortest division on the main scale is equal to 1 mm . The main scale reading is 2 cm and second division of vernier scale coincides with a division on main scale. If mass of the sphere is 8.635 g , the density of the sphere is: (1) $2.0 \mathrm {~g} / \mathrm { cm } ^ { 3 }$ (2) $1.7 \mathrm {~g} / \mathrm { cm } ^ { 3 }$ (3) $2.2 \mathrm {~g} / \mathrm { cm } ^ { 3 }$ (4) $2.5 \mathrm {~g} / \mathrm { cm } ^ { 3 }$
Q20. The diameter of a sphere is measured using a vernier caliper whose 9 divisions of main scale are equal to 10 divisions of vernier scale. The shortest division on the main scale is equal to 1 mm . The main scale reading is 2 cm and second division of vernier scale coincides with a division on main scale. If mass of the sphere is 8.635 g , the density of the sphere is:\\
(1) $2.0 \mathrm {~g} / \mathrm { cm } ^ { 3 }$\\
(2) $1.7 \mathrm {~g} / \mathrm { cm } ^ { 3 }$\\
(3) $2.2 \mathrm {~g} / \mathrm { cm } ^ { 3 }$\\
(4) $2.5 \mathrm {~g} / \mathrm { cm } ^ { 3 }$