Construction 82411

It should have taken four trucks 6 hours and 45 minutes to bring the sand to the construction site. After 90 minutes, one car broke down. How long did it take to transport the remaining sand in three trucks?

Correct answer:

t =  8.5 h

Step-by-step explanation:

t1=6:45=6 hr 45 min =6+6045=6.75 hr=6.75 t2=90/60=23=1.5 h  4 t1=4 t2+3 (tt2) 4 6.75=4 1.5+3 (t1.5)  3t=25.5  t=325.5=8.5  t=217=8.5=8.5 h



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