Mathematics for IGCSE & O level - Rates (Section 2 - No. 7)
Flour is loaded into a lorry which holds 20 tonnes. It takes 40 minutes to load the lorry. What is the rate of flow, in kilograms per minute?
500 kg/min
600 kg/min
700 kg/min
800 kg/min
คำอธิบาย
20 tonnes = 20000 kg. Rate of flow = 20000 kg / 40 min = 500 kg/min