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A city tower construction uses 4520 tones of cement trucked from a factory that is 7 kilometres
from the construction site. Each cement mixer can carry 7 tonnes of cement, and the cement
costs $85 per truck load for the first 30 loads and $55 per load after that.
a. How many loads of cement are needed? Add a full load for any remainder.
b. Find the total cost of cement needed to make concrete for the tower construction.

Respuesta :

rvkacademic

Answer:

a) 646 truck loads

b) $36, 430

Step-by-step explanation:

Since we need to transport 4520 tons of cement and each mixer can carry 7 tons, the total number of loads = 4520 / 7 =645.71 rounded up to 646 loads (Answer a)

b) The first 30 truck loads will cost $85 per load so total cost = 85 x 30 = $ 2,550

The remaining (646-30) truck loads cost $55 per load so cost for the remaining tuck loads after the first 30 = (646-30) x 55 = 616 x 55 = $33,880

Total cost = 33,880 + 2,550 = $36, 430

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