Mr. P has two vacuum cleaners which are pictured below.
When he went to the store to buy a new vacuum, the salesman told him, "This vacuum will cut your work in half," so Mr. P said, "I'll take two."
(the math didn't work out the way he thought it would).
Both models are cordless and run on a battery.
The Dyson V-8 has two modes, but the Dyson V-11 has three modes (Eco, Med, and Boost), and that is the vacuum that is used in this problem.
When fully charged, the Dyson V-11 can clean for 67 minutes in Eco mode, or it can clean for 33 minutes in Med mode,
or it can clean for 15 minutes in Boost mode.
Mr. P needs to use the Boost mode for three minutes to do some heavy cleaning and he needs to use the Med mode for 8 minutes to clean some moderate areas.
How much time will he have left in Eco mode to finish cleaning his house before the vacuum needs to be recharged?
Send your solution by the end of the month to:
David Pleacher