With an average speed of 40 km/hr a car takes 7 hrs to reach a certain distance. With what speed will it be able to cover the same distance in 5 hours ?  Options.
A) 46 km/hr B) 56 km/hr C) 58 km/hr D) 48 km/hr E) 54 km/hr
40:x= 5:7, x being the speed of the car. ie) 5x =40*7/5= 
<gadget id="calculator">40*7/5</gadget>
<output>56</output>
56 The speed of the car=56 km/hr Answer : 56 km/hr
<result>B</result>
With an average speed of 40 km/hr a car takes 7 hrs to reach a certain distance. With what speed will it be able to cover the same distance in 5 hours ?