Question

Steve drives an electric car. He can drive 425 kilometres before he needs to stop and re-charge his car. It takes 10 minutes to charge 50 kilometres. How long does Steve have to wait for his car to fully charge?

Answer 1

Answer: 1 h 25 min

Explanation:

Let us make the proportion:

10 min - 50 km

x min - 425 km

Hence,

`\displaystyle\\x=(425(10))/(50) \\\\x=(85(5)(10))/(5(10)) \\\\x=85 \ min\\\\x=(60+25) \ min\\\\x=1\ hour\ 25\ min`

Answer 2

Steve has to wait for 1 hour 25 minutes