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Mathematics

2 answers:

elixir [45]3 years ago

7 0

3 hours and 20 minutes

Step-by-step explanation:

If you are going 50km/h for 4 hours then you travel a total of 200km so now you multiply 60 by 3 to get a total of 180km then subtract 180km from 200km to see what is missing then you get 20km and since you are going 60km/h and 20km are missing every km is a minute long so it would be 3 hours and 20 minutes.

PolarNik [594]3 years ago

6 0

50 km/h = 4 hours
60 km/h = x hours

50x = 60×4

50x = 240

x = 4.8 hours

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kakasveta [241]

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6 0

3 years ago

Read 2 more answers

The area of a trapezium is 800 cm2

svlad2 [7]

Answer:

The distance between the parallel sides is 20cm.

Step-by-step explanation:

Area of a trapezoid:

$A=\frac{a+b}{2}\times h$

where a and b are the 2 bases, and h is the height. The value we're trying to find here is the height.

3 of the 4 variables in this equation are already given:

A = 800

a = 48

b = 32

Just plug those in and solve for h:

$\rightarrow 800=\frac{48+32}{2}\times h\\\rightarrow 800=\frac{80}{2}\times h\\\rightarrow 800=40\times h\\\rightarrow 800\div40=h\\\rightarrow h=20$