Question

1. A pilot flew a jet from City A to City B, a distance of 1600 mi. On the return trip, the average speed was 20% faster than the outbound speed. The round-trip took 5 h 20 min. What was the speed from City A to City B?

2. It took a crew 3 h 44 min to row 7 km upstream and back again. If the rate of flow of the stream was 1 km/h, what was the rowing speed of the crew in still water?

3. A wire 370 in. long is cut into two pieces. One piece is formed into a square and the other into a circle. If the two figures have the same area, what are the lengths of the two pieces of wire (to the nearest tenth of an inch)?

4. A square plot of land has a building 70 ft long and 60 ft wide at one corner. The rest of the land outside the building forms a parking lot. If the parking lot has area 10,200 ft², what are the dimensions of the entire plot of land?

Answer 1

- B 5 al. let the speed of jet 1600 mi from A to B us x A and from B to to is & +20% of a = x+ 20x = 6x total time = sher 20 min = 5h+20 h = 16 hrs Then, Distance = speed & time - time = Distance speed alle - 1600 + 1600 x 6415 1600 + 8000 ox 9600+8000 1o culo who = 6x 2 + 16X6X = 17600 7 32x = 17600 1x = 550 mil her )