A trader hired a taxi at a rate of 15 naira per day plus 5k for each kilometre travelled. If he used it for 4 days and travelled a total distance of 400 kilometers, what was the total cost of hiring the taxi?
The total cost of hiring the taxi for 4 days is 15 naira/day * 4 days = <<15*4=60>>60 naira.
The total cost of travelling 400 kilometers is 5k/kilometer * 400 kilometers = 2000k.
Converting the cost to naira gives 2000k * 1000 naira/k = <<2000*1000=2000000>>2000000 naira.
Therefore, the total cost of hiring the taxi is 2000000 naira + 60 naira = <<2000000+60=2000060>>2000060 naira. Answer: \boxed{2000060}.
To calculate the total cost of hiring the taxi, follow these steps:
Step 1: Calculate the cost per day
The trader hired the taxi at a rate of 15 naira per day.
Cost per day = 15 naira
Step 2: Calculate the cost per kilometer
The trader also has to pay 5k (5 naira) for each kilometer travelled.
Cost per kilometer = 5 naira
Step 3: Calculate the total cost for the number of days used
The trader used the taxi for 4 days.
Total cost for the days used = Cost per day x Number of days
= 15 naira x 4
= 60 naira
Step 4: Calculate the total cost for the distance travelled
The trader travelled a total distance of 400 kilometers.
Total cost for distance travelled = Cost per kilometer x Total distance
= 5 naira x 400
= 2000 naira
Step 5: Calculate the total cost of hiring the taxi
To calculate the total cost, add the total cost for the days used to the total cost for the distance travelled.
Total cost = Total cost for the days used + Total cost for distance travelled
= 60 naira + 2000 naira
= 2060 naira
Therefore, the total cost of hiring the taxi is 2060 naira.
To find the total cost of hiring the taxi, we need to calculate both the cost per day and the cost per kilometer.
The trader hired the taxi for 4 days. The cost per day is 15 naira. Therefore, the total cost for the 4 days is:
4 days * 15 naira/day = 60 naira.
The trader also traveled a total distance of 400 kilometers. The cost per kilometer is 5k (k is short for kobo, a Nigerian fractional currency). Therefore, the total cost for the distance traveled is:
400 kilometers * 5k/kilometer = 2000 kobo.
To convert the cost in kobo into naira, we need to divide by 100, because there are 100 kobo in 1 naira. Therefore, the total cost of traveling 400 kilometers is:
2000 kobo รท 100 = 20 naira.
Finally, to find the total cost of hiring the taxi, we add the cost for the 4 days (60 naira) to the cost for traveling 400 kilometers (20 naira):
60 naira + 20 naira = 80 naira.
Therefore, the total cost of hiring the taxi is 80 naira.