A car traveling with 5/7 of its actual speed covers 42 km in 1 hr 40 min 48 sec. What is the actual speed of the car? Choose the correct choice from the following choices:  A) 30km/hr  B) 35km/hr  C) 25km/hr  D) 40km/hr  E) 45km/hr
Explanation:   time =1 hr 40 min 48 sec   =1 hr +4060 hr +48/3600 hr   =1+2/3+1/75=126/75hr   distance =42 km   speed=distance/time=42(126/75) =42Ã—75/126=25 km/hr=25 km/hr   â‡’57 of the actual speed =25   â‡’ Actual speed =25Ã—7/5=35 km/hr   ANSWER IS 35km/hr
<result>B</result>
A car traveling with 5/7 of its actual speed covers 42 km in 1 hr 40 min 48 sec. What is the actual speed of the car?