SOLUTION: Tom covers 280 km distance daily at a speed of 80km/hour if speed is reduced by10km/hour. How much time will he take to cover same distance

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Question 1042835: Tom covers 280 km distance daily at a speed of 80km/hour if speed is reduced by10km/hour. How much time will he take to cover same distance
Found 3 solutions by Alan3354, josgarithmetic, ikleyn:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
d = r*t
t = d/r

Answer by josgarithmetic(39614) About Me  (Show Source):
You can put this solution on YOUR website!
RT=D is the travel rates rule relating "speed" R, time T, and distance D.

system%2880%2At=280%2C%2880-10%29%28t%2Bx%29=280%29
two unknown variables, two equations;
You can simply solve for t right away... and then......



Forming a table of data can often help to find the equations to make for the problem description. Here, the description was taken directly to the two listed equations without a data table.

Answer by ikleyn(52756) About Me  (Show Source):
You can put this solution on YOUR website!
.
280%2F70 = 4 hours.

There is no need to solve any equations.