Algebra, STD2 EQ-Bank 25

A car takes 5 hours to complete a journey when travelling at 72 km/h.

How long would the same journey take if the car were travelling at 90 km/h? (2 marks)

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\(\text{4 hours}\)

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\(\text{Distance of the trip:}\)

\(d=s \times t = 72 \times 5= 360\ \text{km}\)

\(\text{Time at new speed:}\)

\(\text{Time at 90 km/h}\ =\dfrac{360}{90}= 4\ \text{hours}\)