B D 7 Four tunnels are supposed to be bored through the

Last updated: 6/21/2023

B D 7 Four tunnels are supposed to be bored through the earth between two places on a longitude as shown in the figure One of them with midpoint at A is straight whereas other three have bent at their midpoints B C and D Both the bent sections are coplanar A particle released from one end of the tunnels spends time intervals TA TB TC and TD respectively to reach the other end If the particle passes the bent smoothly without a change in speed there which of the following relations will these time intervals bear a TA TB Tc TD c TA TC TB TD b TA TC TB TD d TB TA Tc TD