A) \[{{t}_{1}}+{{t}_{2}}\]
B) \[{{t}_{2}}-{{t}_{1}}\]
C) \[\frac{{{t}_{2}}-{{t}_{1}}}{2}\]
D) \[\frac{{{t}_{1}}+{{t}_{2}}}{2}\]
Correct Answer: D
Solution :
: Time for journey\[AB={{t}_{1}}\] ...(i) Time for journey\[ABCB={{t}_{2}}\] \[\therefore \] Time for \[(AB+BC+CB)={{t}_{2}}\] ...(ii) Add up (i) and (ii) Time for \[(AB)+(AB+BC+CB)={{t}_{1}}+{{t}_{2}}\] or Time for \[2AB+2BC={{t}_{1}}+{{t}_{2}}\] or Time for\[(AB+AC)=\frac{({{t}_{1}}+{{t}_{2}})}{2}\] \[\therefore \]Time for reaching highest point\[=\frac{({{t}_{1}}+{{t}_{2}})}{2}\]You need to login to perform this action.
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