Missing precipitation data (hydrology)

[tzx9633]

Homework Statement

Develop a hydrograph (rainfall intensity vs time) for the precipitation data . Then , estimate the amount of gauge
X if there adjacent station precipitation amount of A , B and C are 42.4 , 35.3 and 38.4 respetively .

Homework Equations

The Attempt at a Solution

So , i calculate the precipitation at 30 mins interval first , as shown in the excel file .

I think there's something wrong with this question . Normally this type of question ( when we are asked to find the missing precipitation data) , we would use normal ratio or arithmethic mean method ...

In both cases , the normal annual precipitation is needed . But , in this question , the normal annual precipitation isn't provided .So , i think this question can't be done .

Is my concept correct ?

P/s : The data is in photo 713

 

[haruspex]

As far as I can make out, there is no connection between the first part of the question and the second. This suggests an editing error. If they really are two separate questions, you have no choice but to assume the arithmetic method can be applied.