Last night, Roberto spent 90 minutes doing homework, infinity symbol hour reading, and 540 seconds making his lunch for the next day. How ma

Question

Last night, Roberto spent 90 minutes doing homework, infinity symbol hour reading, and 540 seconds making his lunch for the next day. How many more minutes did Roberto spend doing homework than he did reading and making his lunch?

A) 81 minutes
B) 50 minutes
C) 49 minutes
D) 41 minutes

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Thu Thủy 4 years 2021-07-31T00:36:10+00:00 2 Answers 96 views 0

Answers ( )

  1. Dulcie
    0
    2021-07-31T00:37:34+00:00
    Reply

    Answer:

    41 minutes

    Step-by-step explanation:

    We are given;

    Time spent on homework = 90 minutes

    Time spent reading = 2/3 hours = 2/3 × 60 minutes = 40 minutes

    Time spent making lunch = 540 seconds = 540/60 minutes = 9 minutes

    We want to find how many more minutes Roberto spent doing homework than he did reading and making his lunch.

    Thus;

    Time spent on reading and making lunch = 40 + 9 = 49 minutes

    Hence, the word “how many more” means we will subtract 49 from 90.

    So, “how many more minutes” = 90 – 49 = 41 minutes

    Step-by-step explanation:

  2. hongcuc2
    1
    2021-07-31T00:38:06+00:00
    Reply

    41 mins hope this helps

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