Question

3. A boy cycles down from his house to his school at a speed of 24 km/h and reaches school in 25 minutes. How far is the school from his house?

Answer 1

Answer:

C

5 km

Let the distance of his office be xkm and thr right time to reach office be t min

Time taken to reach office at 8km/hr =

60

t+2.5

=

8

x

(i)

Time taken to reach office at 10km/hr =

60

x−5

=

10

x

(ii)

Subtracting (ii) from (i) we get,

60

7.5

=

8

x

−

10

x

60

7.5

=

40

5x−4x

x=

60

7.5×40

x=5km