Answer:
Case1:
Men : 30
Work : 1
Time (day×hr): 56×6 = 336 hr.
Case2:
Men : let it be m men.
Work: 1
Time: 45×7 = 315 hr.
Work being constant in both cases, men and time are in inverse proportion i.e, more men take less time.
Product of men and time is constant in both cases.
Therefore, 30×336=m×315
Or, 30×336/315 = m
Or, m = 32.
Hence, required number of men is 32.
Step-by-step explanation:
28.26 feet squared if using 3.14 for pi
Answer:
Given:-
The length of copper wire (L) = 270 cm
Area of cross-sectional (A) = 0.030 
and specific resistance (ρ) = 
ohm-cm.
Use the formula R=(Specific resistance*L)/A, to calculate the Resistance(R)
then, 
ohm
Simplify:
R = 0.0162 ohm = 
ohm
Therefore, the resistance of copper wire is, Ω
Answer:
Step-by-step explanation:
U have to multiply 49 by 49 and then subtract 9
