Question

Anand leaves his house at 8.30 a.m. for his school. The school is 2 km away and classes start at 9.00 a.m. If he walks at a speed of 3 km/h for the first kilometer, at what speed should he walk the second kilometer to reach just in time?

Answer 1

A-----------B-----------C
let A is anand house
B is1km distance apart from his house
C is school
we know time =distance/speed
tAB=1/3 hour
tAB is time takenfrom A to B
tBC=1/2-1/3 =1/6hour
so, speed=distance/time=1/(1/6)=6km/h

Answer 2

Answer:

6km\hr

Explanation:

A-----------B-----------C

let A is anand house

B is1km distance apart from his house

C is school

we know time =distance/speed

tAB=1/3 hour

tAB is time takenfrom A to B

tBC=1/2-1/3 =1/6hour

so, speed=distance/time=1/(1/6)=6km/h