Question

Jose's school is 4 km away. He walked 30 min at 5 km/hr when he realized he was running late and started running. How fast does he need to to make it to school before the bell rings in 15 minutes.

Answer 1

Answer:

Jose need to travel with a speed of $6$ Km/hr to reach school in 15  minutes before the bell rings.

Step-by-step explanation:

Total distance from home to School $= 4$ km

Distance travelled by Jose in first $30$ minutes is equal to

$\frac{30}{60} * 5\\= 2.5$

Distance to travel in next $15$ minutes is equal to

$4 -2.5 = 1.5$ Km

Required speed

$\frac{1.5}{\frac{15}{16} } \\= 1.5 * 4\\= 6$

Jose need to travel with a speed of $6$ Km/hr to reach school in 15  minutes before the bell rings.