Question 1125616
Let {{{ s }}} = the speed to arrive on time
Let {{{ t }}} = the time to arrive on schedual
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(1) {{{ 250 = s*t }}}
(2) {{{ 250 = 60*( t + 10/60 ) }}}
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(2) {{{ 250 = 60t + 10 }}}
(2) {{{ 60t = 240 }}}
(2) {{{ t = 4 }}}
And
(1) {{{ 250 = s*4 }}}
(1) {{{ s = 62 .5 }}}
The train should travel 62.5 km/hr
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Check:
(2) {{{ 250 = 62.5*t }}}
(2) {{{ t = 4 }}}
OK