Answer:
The width is 5 feet.
Step-by-step explanation:
If the length of the banner is 15 feet, and the length of the banner is 3 times the width of the banner, then set up an equation to find the width of the banner.
banner length/3 = banner width
15/3 = w
w = 5
The width of the banner is 5 feet.
By unitary method
40/10 = 4km / litre
So,
4*25 = 100 km
The car covers 100km with 25 litres of fuel
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3X + 6 + 4X + 20
7X + 26