Amisha walks 3 km at a speed of 2 km/h, runs 7 km at a speed of 4 km/h and goes another 32 km by bus. If the speed of the bus is 28 km/h, thenfi nd Amisha’s average speed for the whole journey.

A

$$\frac{394}{41}$$ km/h

B

$$\frac{393}{41}$$ km/h

C

$$\frac{392}{41}$$ km/h

D

$$\frac{391}{41}$$ km/h