Mars in a Minute: Is Mars Red Hot?

Mars is the nearest planet to the Earth.

The rocket which gives us in formation about Mars is :

Write short note on : Space Missions to Mars and other planets

Kyun kehtein hai Mars ko Red planet

In the echo method of estimating distnces, a radar signa was sent towards the Mars. If the echo was received after 8 minute 20 second, how far wat the Mars from the earth at that instant?