Question

When Alisha goes by car at 50 kmph, she reaches her office 5 minutes late. But
when she takes her motorbike, she reaches 3 minutes early. If her office is 25
kms away, what is the approximate average speed at which she rides her
motorbike?

Answer 1

Step-by-step explanation:

Difference of time = 5 + 3 = 8 minutes

=

8

hour =

2

hour

60 15

If the speed of motorbike be x kmph, then

25

−

25

=

2

50 x 15

⇒

25

=

1

−

2

x 2 15

⇒

25

=

15 − 4

=

11

x 30 30

⇒ 11x = 25 × 30

⇒ x =

25 × 30

11

=

750

= 68.18 kmph

11

≈ 68 kmph