Drops of water are dripping steadily from a tap (faucet). The diagram shows a measuring cylinderwhich has collected 120 drops of water.246810cm3waterHow many drops in total will have been collected when the measuring cylinder reads 10 cm3?A 48 B 60 C 180 D 3003 In a race, a car travels 60 times around a 3.6 km track. This takes 2.4 hours.What is the average speed of the car?A 1.5 km / h B 90 km / h C 144 km / h D 216 km / h
Question
Drops of water are dripping steadily from a tap (faucet). The diagram shows a measuring cylinderwhich has collected 120 drops of water.246810cm3waterHow many drops in total will have been collected when the measuring cylinder reads 10 cm3?A 48 B 60 C 180 D 3003 In a race, a car travels 60 times around a 3.6 km track. This takes 2.4 hours.What is the average speed of the car?A 1.5 km / h B 90 km / h C 144 km / h D 216 km / h
Solution
Let's break down each question:
- "Drops of water are dripping steadily from a tap (faucet). The diagram shows a measuring cylinder which has collected 120 drops of water. 2 4 6 8 10 cm3 water. How many drops in total will have been collected when the measuring cylinder reads 10 cm3?"
First, we need to find out how many drops of water make up 1 cm3. If 120 drops make up 8 cm3 (as per the diagram), then 1 cm3 is made up of 120/8 = 15 drops.
So, if the measuring cylinder reads 10 cm3, the total number of drops collected would be 15 drops/cm3 * 10 cm3 = 150 drops. Therefore, the answer is not listed among the options A, B, C, D.
- "In a race, a car travels 60 times around a 3.6 km track. This takes 2.4 hours. What is the average speed of the car?"
First, we need to find out the total distance travelled. If one lap is 3.6 km, then 60 laps would be 60 * 3.6 = 216 km.
Next, we need to calculate the average speed. Speed is distance/time, so the average speed would be 216 km / 2.4 hours = 90 km/h.
Therefore, the answer to the second question is B, 90 km/h.
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