A body moving in a straight line with constant acceleration covers distances $\mathrm{a}$ and $\mathrm{b}$ in successive equal time interval of $\mathrm{t}$. The acceleration of the body is

• A

  $\frac{\mathrm{a}+\mathrm{b}}{{\mathrm{t}}^2}$
• Correct answer
  B

  $\frac{\mathrm{b}-\mathrm{a}}{{\mathrm{t}}^2}$
• C

  $\frac{2\mathrm{b}-\mathrm{a}}{2{\mathrm{t}}^2}$
• D

  $\frac{\mathrm{b}-2\mathrm{a}}{{\mathrm{t}}^2}$

Hence, the correct answer is option: 'B'.