two sides of an isosceles triangle with a perimeter of 270 cm are in a ratio of 4:7. Find the possible measure(s) of the base

Base  = 126 cm or 60 cm

Step-by-step explanation:

Ratio of sides of isosceles triangle = 4 : 7

Sides  are = 4x , 7x

If smallest sides of the isosceles triangle are equal, then

three sides are = 4x , 4x , 7x

Perimeter = 270 cm

4x + 4x + 7x = 270

           15x = 270

              x = 270/15

              x = 18

Base = 7x = 7*18 = 126 cm

If largest sides of the isosceles triangle are equal, then

Three sides are = 7x , 7x , 4x

7x + 7x +4x = 270

           18x = 270

              x =  270/18

              x = 15

Base = 4x = 4 * 15 = 60 cm

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.