1. This tour group has reserved several rooms for tourists in hotels on the island. If there are four people, there are 13 beds; if there are six people, there are 29 beds. How many people visited the island this time?

The tour group booked X rooms for tourists in the hotel on the island.

4x- 13=6x-29

x=8

Then a person who ***4*8- 13= 19 went to the island this time.

2. Three trapezoids A, B and C, their height ratio is 1: 2: 3, the bottom ratio is 12: 15: 10, and the top-bottom ratio is 6: 9: 4. It is known that the area of trapezoid A is 60 square centimeters, so we can find two of B and C..

S= (upper sole+lower sole) * height /2

S 1=60

S2+S3=300