Question

A man complete a journey in 10hr.He travel first half​of journey at the rate of 21km/hr . Second half of journey at the rate of 24km/hr.find total journey in km

Answer 1

Step-by-step explanation:

$let \: the \: distance \: be \: \: x \\ \frac{x}{21} + \frac{x}{24} = 10 \\ \frac{8x \: + 7x}{168} = 10 \\ 15x \: \: \: = 1680 \\ x = 112$

hope that it help.