Question 580597
Let {{{ s }}} = the speed of the bus
{{{ 1.5s = 60 }}} km/hr is the speed of the car
{{{ s = 60/1.5 }}}
{{{ s = 40 }}} km/hr
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For the car:
{{{ 72 = 60t[1] }}}
{{{ t[1] = 72/60 }}}
{{{ t[1] = 1.2 }}} hrs
For the bus:
{{{ 72 = 40t[2] }}}
{{{ t[2] = 72/40 }}}
{{{ t[2] = 1.8 }}} hrs
The bus takes {{{ 1.8 - 1.2 = .6 }}} hrs longer
{{{ .6*60 = 36 }}}
The bus takes 36 minutes longer