You have bought a mobile phone which is yet to be connected to a communications company. You have two communication companies to choose from, which are:
1. Phonekom charges forty cents each time you make a phone call plus three cents for every second you use he phone.
2. Communico charges fifty cents each time you make a phone call plus one cent for every second you use the phone.
AT WHAT TIME WILL EACH TELECOMMUNICATIONS COMPANY CHARGE THE SAME AMOUNT?
2006-10-01 01:27:26 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
At the fifth second. At first second Phone "A" will charge 43 and B will 51, then - A - 46, B - 52, the A - 49, B - 53, Then A- 52 and B- 54 and at fifth second a will charge 55 and B will also charge 55. (Currency in Paise). Theere is an equation that is 3x+40 = X + 50. Where X is the seconds. So prefer communoco....
2006-10-01 01:33:53 · answer #1 · answered by Ashu 3 · 0⤊ 0⤋
You can approach this problem by trial and error method. By doing it that way, the answer is 5 seconds.
1. Phonekom charges 40 cents plus three cents for every second
Therefore, for 5 seconds, 40 + 5(3) = 55
2. communico charges 50 cents plus one cent for every second
Therefore, for 5 seconds, 50 + 5(1) = 55.
Answer : 5 seconds.
2006-10-01 08:34:30 · answer #2 · answered by Alan 2 · 1⤊ 0⤋
The cost will be the same when the time in seconds used is
equal to 5 times the number of calls made..
For example, if you make 1 call on each phone, and stay on the
line 5 seconds, the cost will be the same.
But there can be a series of answers if you allow different numbers of calls and widely different connect times.
2006-10-01 08:36:58 · answer #3 · answered by hls 6 · 1⤊ 0⤋
The charge will be the same when
40 + 3t = 50 + t So
2t = 10
t = 5
So..... If your phone calls are mostly under 5 seconds, Phonekom is the way to go. But if they're mostly over 5 seconds, Communico is a far better deal âº
Doug
2006-10-01 08:33:54 · answer #4 · answered by doug_donaghue 7 · 1⤊ 0⤋
In 5 seconds time, both companies would charge similar amounts
2006-10-01 08:37:13 · answer #5 · answered by Steph_kinse 2 · 1⤊ 0⤋
4 seconds on phonecom and 2 seconds on communico
2006-10-01 08:34:11 · answer #6 · answered by Anonymous · 1⤊ 0⤋
A six minute call should cost the same from both companies.
2006-10-01 08:30:22 · answer #7 · answered by Bart S 7 · 1⤊ 0⤋
Here is the equation you must solve for x:
40 + 3x = 50 + x
2006-10-01 08:31:12 · answer #8 · answered by sloop_sailor 5 · 1⤊ 0⤋