Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
There are 30 students in Ms. Leech's class. Twice as many girls as boys are in the class. There are 10 boys in the class and each boy today brought 5 cups for science activity class as Ms. Leech had instructed. If the total number of cups brought by the students in the class is 90, how many cups did each girl bring?

### Response:
 Idadi ya wasichana katika darasa la Bi. Leech ni mara mbili ya idadi ya wavulana ambayo ni 2*10 = <<2*10=20>>20
Ikiwa kila mvulana alileta vikombe 5 kwa shughuli ya kisayansi, jumla ya vikombe vilivyobebwa na wavulana ni 5*10 = <<5*10=50>>50.
Jumla ya vikombe ambavyo wasichana walileta ni 90-50= <<90-50=40>>40.
Kwa kuwa idadi ya wasichana katika darasa ni 20, kila msichana alileta vikombe 40/20 =2.