Question 952853
Lety {{{ t }}} = her time in minutes
for her 8th ride
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{{{ ( 46 + 48 + 50 + 43 + 54 + 54 + 52 + t ) / 8 = 51 }}}
{{{ 347 + t ) / 8 = 51 }}}
{{{ 347 + t = 408 }}}
{{{ t = 61 }}}
She needs a time of 61 min on her 8th ride
in order to average 51 min for the 8 rides