Answer:
The cost of sending the telegram is $6.
Explanation:
Since 3 St. Post Office charges for an ordinary telegram are $ 4 for the first 10 words and 40 cents for each extra word, to calculate the cost of sending this telegram: MR KAMAU ARRIVING AT 0630 EAST AFRICAN TIME ON BOARD KQ 46 INFORM THE WIFE must perform the following calculation:
The telegram has 15 words.
4 + ((15 - 10) x 0.40) = X
4 + (5 x 0.40) = X
4 + 2 = X
6 = X
Therefore, the cost of sending the telegram is $ 6.