Question

A bus travels for 7 hours, the first half at 30km/hr and the second half at 40km/hr. Find the distance.

Answer 1

Answer:

Distance=245km

Explanation:

D=s×t

D=(40+30)/2 × 7

D=35×7

D=245km

Answer 2

Answer:

The total distance cover by bus is 240 km .

Explanation:

Given as :

Total time to travel distance = 7 hours

Let The total distance cover by bus = x km

The speed for first half distance = 30 km/h

The speed for second half distance = 40 km/h

According to question

Time = $\dfrac{distance }{speed}$

Or, 7 = $\dfrac{\dfrac{x}{2} }{30}$  + $\dfrac{\dfrac{x}{2} }{40}$

Or, 7 = $\dfrac{\dfrac{4x}{2}+\dfrac{3x}{2} }{120}$

Or, 7 × 120 = $\dfrac{7x}{2}$

or, 7 x = 7 × 120 × 2

∴      x = 240 km

So,  The total distance cover by bus = x = 240 km

Hence, The total distance cover by bus is 240 km . Answer