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### Discussion :: Time and Distance

1.  A car travelling with $$\frac { 5 } { 7 }$$of its actual speed covers 42 km in 1 hr 40 min 48 sec. Find the actual speed of the car.

2.  A. 17$$\frac { 6} { 7 }$$km/hr B. 25 km/hr C. 30 km/hr D. 35 km/hr

Explanation :

Time taken = 1 hr 40 min 48 sec = 1 hr 40$$\frac { 4} { 5 }$$min=1$$\frac {51} { 75 }$$hrs=$$\frac {126} { 75 }$$hrs.

Let the actual speed be x km/hr.

Then,$$\frac { 5} {7 } XX$$$$\frac {126} { 75 }$$=42

x =$$[\frac {42*7*75 } {5*126 } ]$$= 35 km/hr.

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