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6 June, 02:59

Sue should have finished (28+16x) Mathematics questions in 4 hours.

A) How many questions would have been done in 30 minutes?

B) If Sue could only finish (14+8x) questions, how much time did she spend?

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  1. 6 June, 05:16
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    A) 3.5+2x

    b) 2 hr

    workings

    a) 4 hr = 28+16x

    30min = (28+16*) : 8

    = 3.5+2x

    b) 30min = 3.5+2x

    (14+8x) : (3.5+2x)

    =4

    30 min * 4 = 2hr
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