Question

what is the average altitude and width of Himachal

Answer 1

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I hope that some of this extra information will help you,
The Himalayan Range of Mountains

Himachal lies in the Middle Himalayan Range.

Other ranges being - Outer Himalaya(Siwalik), Inner Himalaya( Mt. Everest) and Trans Himalaya (Mount K-2)

1) The Middle Himalaya forms the most intricate and rugged mountainous system, it is 60-80 km wide and 3700-4500m high. Its Vedic name is Himachal

2) Most of the hills stations such as Dalhousie, Manali, Shimla, Nanital, Musoorie, Darjeeling, etc. are located in this range.