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     EduGorilla 
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    A factory uses two machines, M1 and M2 to manufacture three types of soap, P, Q and R. The two machines operate 8 hours a day each. The efficiency of the two machines with respect to the three types of soap is given in the table below. The numbers indicate the time taken (in minutes) by the two machines to manufacture one unit each of the three types of soap.

    A soap of type R can be manufactured only after three soaps each of types P and Q have been manufactured. If fifteen soaps of type R are needed on a particular day, what is the extra time that the machines will have to operate?

    Options :-

    1. 25 min

    2. 15 min

    3. 40 min

    4. 30 min

    5. none of the above

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