25xt⁻⁴ / 5⁻³x10xt⁻⁸ (t≠0) = 5²xt⁻⁴/5⁻³x5x2xt⁻⁸ = 5²⁻(⁻³)⁻¹xt⁻⁴⁻⁸/2 [∵ aᵐ÷aⁿ=aᵐ⁻ⁿ]
= 5²⁺³⁻¹xt⁻⁴⁺⁸/2 = 5⁴xt⁴/2 = 625/2 t⁴

Class 8 Maths Chapter 11 Exercise 12.1 Solution in Video

for more answers vist to:
https://www.tiwariacademy.com/ncert-solutions/class-8/maths/chapter-12/