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The distance of the college and home of Raj is 80km. One day he was late by 1 hour than the normal time to leave for the college, so he increased his speed by 4km/h and thus he reached to college at the normal time. What is the changed (or increased) speed of Raj?
Let the normal speed be x km/h, then
⇒x (x + 20) - 16 (x + 20) = 0
(x + 20 ) (x - 16) =0
x = 16 km/h
Therefore (x + 4) = 20 km/h
Therefore increased speed = 20 km/h
By: MIRZA SADDAM HUSSAIN ProfileResourcesReport error
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