Answer:
Sally should buy two bottles.
Step-by-step explanation:
Information from the question -
Solving the question -
If there are 60 cups with a capacity of 200mL each, the total capacity of all cups is 12000mL = 12L (60*200=capacity, divide by 1000 to convert from mL to L)
1 bottle of squash has 1.5L of squash, 4 times that amount needs to be added for a suitable ratio. Amount of water for 1 bottle = 6L (1.5*4=6). Therefore squash + water = 1.5+6 = 7.5L
The question asks how many bottles Sally should buy. She needs 12L of drink for the 60 cups. 12/7.5=1.6. However, you can't buy 0.6 of a bottle, so she must buy 2 bottles.