First, you have to convert 1/4 and 1/3 to have the same denominator.
So, 1/4 x 3 = 3/12. 1/3 x 4 = 4/12.
Now, you can add 3/12 + 4/12 = 7/12.
Answer:
91
Step-by-step explanation:
Answer:
Given:
The radius of a wheel =r=35 cm=0.35 cm.
The speed it must keep =s=66 km/h=
60
66×1000
m/min=1100 m/min
To find out:
The number of revolution =n, it makes per minute to maintain that speed.
Solution:
The circumference =C of the wheel =2πr=2×
7
22
×0.35 m=2.2 m=C
The distance the wheel covers in 1 min=d=1100 m.
Now the distance =d covered by a wheel in one revolution = the circumference of the wheel.
∴ Here the number of revolution =n=
C
d
=
2.2
1100
=500.
Probably you are supposed to compute
Factorize the numerator and denominator, then simplify:
