Question

8. A boy leaves his house at 9.30 a.m. for his
school. The school is 2 km away and classes start at
10.00 a.m. If he walks at a speed of 3 km/h for the
first kilometre, at what speed should he walk the
second kilometre to reach just in time?​

Answer 1

Answer:

He walks at a speed of 3km/h

which means he walked for 1km in 20 minutes

at 9•50 he walked 1km

so in 10 minutes,he should walk another 1 km

So, he should walk at a speed of 6km/ h to reach just on time