Question

If a special lunch takes 45 min to deleiver and a standard lunch takes 30 min to deliver and a cake takes 2 hours to deleiver we want all three orders at 1 clock at what time we should placeia order?

Answer 1

Given :- If a special lunch takes 45 min to deliver and a standard lunch takes 30 min to deliver and a cake takes 2 hours to deliver we want all three orders at 1 clock at what time we should place the order ?

Solution :-

→ Time taken to deliver a special lunch = 45 minutes

→ Time taken to deliver a standard lunch = 30 minutes

→ Time taken to deliver a cake = 2 hours = 120 minutes .

then, we can conclude that, highest time required to make cake is 2 hours .

so, if we order food before 2 hours , we would get all three items

therefore,

→ we should place the order at = 1 clock - 2 hours before = 11 clock (or we can say that, 2 hours before 1 clock .)

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Answer 2

Given : a special lunch takes 45 min to deliver and a standard lunch takes 30 min to deliver and a cake takes 2 hours to deliver

we want all three orders at 1 clock

To Find : at what time we should place a order?

Solution:

special lunch takes 45 min to deliver

standard lunch takes 30 min to deliver

cake takes 2 hours to deliver

We can notice that maximum time taken is for cake  and is 2 hrs

so if we order 2 hrs before 1 PM

order can be delivered by 1 PM

2 hrs before 1 PM is   11 AM

Hence Order should be placed at 11 AM