form2 maths

Question

Syarikat Pembersihan Sejati offers RM16 for each house visit with a service charge of RM20 per hour. Syarikat Pembersihan Murni offers RM20 for each visit with a service charge of RM 18 per hour. Based on both offers, when will the cost of both cleaning service be the same?

Answer 1

For Syarikat Pembersihan Sejati: Cost = 16 (visit charge) + 20 (service charge per hour) * t (time needed in hours) Cost = 16 + 20t

For Syarikat Pembersihan Murni: Cost = 20 (visit charge) + 18 (service charge per hour) * t (time needed in hours) Cost = 20 + 18t

To find when the cost of both cleaning services will be the same, we can set up the equation:

16 + 20t = 20 + 18t

16 + 20t - 18t = 20 2t = 4 t = 2hours later.