A typist types 1800 words in 1 hour. Find the
number of words that she can type per minute.
(b) If $120.99 is charged for 654 units of electricity
used, find the cost of one unit of electricity.
(c) A man pays a total of $4800 in flat rental
for 3 months. Find his monthly rental rate.
(d) If the mass of a metal bar which is 3.25 m long
is 15 kg, find its mass per metre.
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Answer:
a ) 18OO \ 6O
3O letters per minute
b) 12O.99 x 654
=79127.46 units
c) 48OO \ 3
12OO per month
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