A cyclist rides at a speed of 15 km/h for 2 hours2\text{ hours}2 hours, and then at a speed of 12 km/h for 3 hours3\text{ hours}3 hours.
Which calculation gives the average speed of the cyclist in km/h\text{km/h}km/h?
15+122\frac{15 + 12}{2}215+12
(15×2)+(12×3)5\frac{(15 \times 2) + (12 \times 3)}{5}5(15×2)+(12×3)
(15÷2)+(12÷3)5\frac{(15 \div 2) + (12 \div 3)}{5}5(15÷2)+(12÷3)
(2÷15)+(3÷12)5\frac{(2 \div 15) + (3 \div 12)}{5}5(2÷15)+(3÷12)
204 exam-style questions on CIE IGCSE Physics Motion, covering Motion. Each one has a worked solution and a mark scheme showing where the marks go.