Question

A car travell for 5 hours and first half distance in 42 kmph and rest in 48 kmph then what is total distance by short trick

Answer 1

Answer:

The total distance is 224 kms.

Step-by-step explanation:

Let d be the total distance.

Distance traveled at 42 km/h = $\frac{1}{2}d$

Distance traveled at 48 km/h = $\frac{1}{2}d$

Total time = 5 h

We know that:

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

= $\frac{ \frac{1}{2}d}{42} + \frac{\frac{1}{2}d}{48}$

= $\frac{1}{84}d$ + $\frac{1}{96}d$

= $\frac{5}{224}d$ h

Now we have:

5 = $\frac{5}{224}d$

Then:

d = $\frac{5 x 224}{5}$ = 224 km

Hence, the total distance is 224 kms.