Below Diagram shows the shortest distance between the starting point and the ending point denoted by point P and R respectively.
Now, Triangle "PRQ" is a right-angled triangle, so using Pythagoras Theorem: PQ = PC + CQ PQ = 70 + 70 PQ = 140 RQ = CS = 35 PR2=PQ2+RQ2 PR2=(140)2+(35)2 PR2=19600+1225 PR2=20825 PR=√20825 PR is approximately equal to 144 m. Hence, the correct answer is "144 m".