有2條word problem唔係好識做

1. A man bought some oranges for $240. Unfortunately, five were rotten. To cover the loss, he had to sell the rest of the oranges at a price of $0.2 more than its cost each. How many oranges did he buy?

2.Mr. Leung took half an hour to drive from town A to town B which are 40km apart. Jf his average driving speed for the frist 30km of the journey was 48km/h less than that for the rest of the journey, find his average driving speed for the rest of the journey.

幫幫手 唸左成20分鐘都唸唔到點做... 最好+埋解釋