Adam earns $4 for every car he washes.
He gets $3 bonus for every 5 cars he washes.
- How much will Adam earn if he washes every 5 cars?
- If Adam wants to earn $35, how many cars must he wash?
- If Adam wants to earn $69, how many cars must he wash?
- If Adam wants to earn $62, how many cars must he wash?
(a)
Amount that Adam will earn for washing every 5 cars
= 4 x 5 + 3
= $23
(b)
Number of sets of $23
= 35 ÷ 23
= 1 r 12
Number of cars in 1 set
= 1 x 5
= 5
Number of extra cars that he has to wash
= 12 ÷ 4
= 3
Total number of cars that Adam must wash
= 5 + 3
= 8
(c)
Number of sets of $23
= 69 ÷ 23
= 3 (Note that there is no remainder.)
Total number of cars that Adam must wash
= 3 x 5
= 15
(d)
If Adam wants to earn $62, how many cars must he wash?
Number of sets of $62
= 62 ÷ 23
= 2 r 16
Number of cars in 5 sets
= 2 x 5
= 10
Number of extra cars that he has to wash
= 16 ÷ 4
= 4
Total number of cars
= 10 + 4
= 14
Answer(s): (a) $23; (b) 8; (c) 15; (d) 14