Question

Hello mates....olz solve this♥️♥️30 no.​

Answer 1

SOLUTION:-

A to B at=30 km/h

B to A at=20 km/h

Let Distance of Point A to B =x km

We know Time=Distance÷Speed

Time Taken To cover path from Point A to Point B

Distance=x km

Speed=30 km/h

$time = x \div 30 \\ \\ = \frac{x}{30} \: hours$

Time Taken To Cover path from Point B to Point A

Distance= x km

Speed=20 km/h

$time = \frac{x}{20} \: hours$

Total Distance Covered =x+x=2x km

Total Time Taken

$\frac{x}{30} + \frac{x}{20} \\ \\ \frac{2x + 3x}{60} \\ \\ \frac{5x}{60 } \: hours$

Average Speed=Total Distance÷Total Time Taken

$2 x \div \frac{5x}{60} \\ \\ 2 \cancel x \times \frac{60}{5 \cancel x} \\ \\ \frac{2 \times 60}{5} \\ \\ 2 \times 12 \\ \\ = 24$

$\boxed{\mathbf{\huge{Average\:Speed=24\:km/h}}}$

Answer 2

Answer:

Quantum mechanics (QM; also known as quantum physics, quantum theory, the wave mechanical model and matrix mechanics), part of quantum field theory, is a fundamental theory in physics. It describes physical properties of nature on an atomic