Question

The height of a mountain is 1800 metres.
It is suggested that this mountain has been worn away at an average rate of 0.15 mm per year.
Assuming that the suggestion is correct, calculate the height of the mountain 20 million years ago.

Answer 1

Step-by-step explanation:

20x10^5Xo.15=30^4m.m

30 ^4/1000=300m. ( looo m.m=lm)

I800+ 300 = 2100m. Ans

= 300m

I800+3oom=2100m is the ans:

Answer 2

Answer:

4800m

Step-by-step explanation:

PLEASE MARK MY ANSWER AS BRAINLIEST

Current height:- 1800

Total height loss in 20 million years=

Height worn out per year(In metres)*Number of years

= 15*$10^{-5}$ * 2*$10^{7}$

=3000m

So, height 20 million years ago = (3000 + 1800)m =4800m