If a walks for 16 minutes at the speed of 5000 meters per hour and B pursues a at the speed of 13 kilometers per hour, the time for B to catch up with a is? Hours

Let B catch up with a in X hours
13*x=5*x+5*16/60
X = 1 / 6 (hour) = 10 (minute)

From a to B, a goes first at the speed of 6 km / h. After 40 minutes, B pursues a at the speed of 8 km / h. as a result, a overtakes a at the distance of 5 km from B. find the distance between a and B

Let the distance between AB and ab be x km
x/6-40/60=x/8
The solution is x = 16
A: the distance between AB and ab is 16 kilometers

A walks 16 minutes at the speed of 5 km / h, and B pursues a at the speed of 13 km / h, so as to find out the time for B to chase a

A walks for 16 minutes at the speed of 5 km / h, and B pursues a at the speed of 13 km / h. It takes 16 minutes for B to chase a. the distance a walks: 5 × 16 / 60 = 4 / 3 (km) the time B chases a: 4 / 3 △ 13-5 = 1 / 6 (H). A: B chases a for 1 / 6 hour, that is 10 minutes

(4) Party A and Party B walk from place a to place B. Party B starts at 65 meters per minute and Party A pursues Party B at 80 meters per minute,
It takes 20 minutes to catch up with B. how many meters does B start first than a? (using equation) application questions (all using equation) (1) the library has bought 420 story books and technology trees, the number of story books is 1.8 times of technology trees, how many books do they buy each? (2) a taxi and a car are running from the two cities of a and B, which are 151.2km apart at the same time. The taxi runs 48km per hour, The car travels 78 kilometers per hour, and only after a few hours can the two cars meet? (3) the area of a rectangle is equal to that of a triangle, which is 12 decimeters long and 8 decimeters wide. The bottom of the triangle is 24 decimeters, and how high is it?

(1) Let's buy x science and technology books x + 1.8x = 4202.8x = 420x = 1501.8x = 270 A: buy 150 science and technology books, buy 270 story books (2) let's meet when we were young 48x + 78x = 151.2x = 1.2 A: meet in 1.2 hours (3) let's set the triangle height x decimeter 12 × 8 = 24 × X / 2x = 8 A: the height is 8 decimeters (4) let's set out x before a

If a walks for 16 minutes at the speed of 5000 meters per hour and B pursues a at the speed of 13 kilometers per hour, the time for B to catch up with a is? Hours