Question

Frank ran 65km on Monday, 68km on Tuesday, 66km on
Wednesday, and 80km on Thursday. He ran again on Friday,
then calculated the mean distance run per day to be 70km.
How far did frank run on friday?

Answer 1

Answer:

71

Step-by-step explanation:I think I solve it a weird way but here it is.

70 times 5= 350

65+68+66+80= 279

350-279= 71

Check:

65+68+66+80+71= 350

350/5=70 which means 71 is the correct answer