The Speed at Which a Particle Must Be Accelerated to Triple

The speed at which a particle must be accelerated to triple its mass is

A) $1.24 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s }$
B) $2.62 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s }$
C) $2.83 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s }$
D) $2.99 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s }$