AC Lim's answer to MinJeongwon's Secondary 1 Maths Singapore question.
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Date Posted:
3 years ago
Alternative :
For those overtime hours, he is getting paid 1½ times the usual rate.
So subtract away the normal amount for all 54 hours first.
54 x $2.80 = $151.20
$173.60 - $151.20 = $22.40
$22.40 is the sum of all the extra pay from overtime. Each overtime hour yields an extra ½ hour's worth of pay.
½ hour's worth of pay = $2.80 ÷ 2
= $1.40
Amount of hours done overtime
= $22.40 ÷ $1.40
= 16
For those overtime hours, he is getting paid 1½ times the usual rate.
So subtract away the normal amount for all 54 hours first.
54 x $2.80 = $151.20
$173.60 - $151.20 = $22.40
$22.40 is the sum of all the extra pay from overtime. Each overtime hour yields an extra ½ hour's worth of pay.
½ hour's worth of pay = $2.80 ÷ 2
= $1.40
Amount of hours done overtime
= $22.40 ÷ $1.40
= 16
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