Posted by Simran kaur on Sunday, November 18, 2012 at 2:41am.
A man traveled a distance of 22km in one hour,partly in a car at a speed of 30km/hr and partly on a motorcycle at 18km/hr.find the distance travelled by him in the car.
Ans is 10km plz gve me fst sltn

Math  Steve, Sunday, November 18, 2012 at 4:45am
if the distance traveled by car is c, the 22c is on bike.
add up the times, knowing that time = distance/speed:
c/30 + (22c)/18 = 1
clear fractions to get
3c + 5(22c) = 90
3c + 110  5c = 90
2c = 20
c = 10 
Math  Simran kaur, Saturday, December 1, 2012 at 7:38am
Thanx dear

Math  Raj, Wednesday, December 9, 2015 at 9:20am
This is right answer but this step is wrong .