Question 416352
Let {{{s}}} = speed without the {{{10}}} km/hr increase
(1) {{{ 300 = s*t }}}
And with the increase in speed:
(2) {{{300 = (s + 10)*1}}}
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This is 2 equations and 2 unknowns, so it's solvable
(2) {{{ 300 = s + 10 }}}
(2) {{{ s = 290 }}}
The actual speed is 290 km/hr