Question 1120333
some part of a journey of 780 km was made by a car with speed of 60 km per hour and the remaining journey was made by train with a the speed of 100 km per hour.if the total time required was 9 hours find the time taken by train and distance covered by train
<pre>Let time taken by train be T
Then we get the following DISTANCE equation: {{{matrix(1,3, 100T + 60(9 - T), "=", 780)}}}
Solve this for T, the time traveled by train
Multiply value of T by 100 to get distance traveled by train

OR

Let distance by train be D
Then we get the following TIME equation: {{{matrix(1,3, D/100 + (780 - D)/60, "=", 9)}}}
Solve this for D, the distance by train
Divide value of D by 100 to get time taken to travel by train