Fireman a climbs up 15 rungs of a ladder in 5 seconds, fireman b climbs up 12 rungs of a ladder in 6 seconds, and fireman c climbs up 14 rungs of a ladder in 7 seconds. which firemen climb the ladder at the same rate?

Step-by-step explanation:

Let the rate of fireman A be .

Let the rate of fireman B be .

Let the rate of fireman C be .

Rate of any fire man is defined as the ratio of number of rungs of ladder he climbed to the time he takes to climb them.

It is given that fireman A takes seconds for rungs.

=.

It is given that fireman B takes seconds for rungs.

=.

It is given that fireman C takes seconds for rungs.

=.

It is evident from above data that fireman B,C climb ladder at the same rate.

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk