Question

One astronomical unit is equal to how much metre

Answer 1

An Astronomical Unit (AU) is the average distance between Earth and the Sun, which is about 93 million miles or 150 million kilometers. 

IT IS EQUAL TO 150,000,000 km
= 15 × 10^7
=1.5 × 10^8

1 km = 10^3 OR 1000 m
Therefore,

1 astronomical unit = 1.5 × 10^8 × 10^3
= 1.5 × 10^11

ANSWER = 1.5 × 10^11 m OR 150000000000 m

THE ABOVE MENTIONED ARE APPROX. VALUES
THE CORRECT VALUE IS
= 1.496 × 10^11 m