A man jogs from his home to the nearst market 25km away jogs at an average speed 5km 1h. how long does it taken him to reach the market​

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)