Question

Time period of a simple pendulum is measured at Karachi,what change will occur in the time period ,if it is measured on Mount everest

Answer 1

The time period will increase as you go higher, I believe. I hope it's right.

Answer 2

time period t = 2pi root (l/g) g is acceleration of gravity. As you go up, gravity acceleration is reduced (inverse square law of Newtonian gravity).  so, the time period should increase. As the other answerer has answered.