Answer:
Hey
Definition:-
A square root is a number which produces a specific quantity when multiplied by itself.
Example:-
Suppose the area of a square of side 6 cm is given by 6 × 6 = 36 cm².
Therefore 36 is said to be the square of 6. We write 6² = 36 and we read the ‘the square root of 6 is 36' or simply ‘6 squared is 36.'
hope this helps
112? kxkdjejeiidisiskskdkks
Standard Form: 79,031
Expanded Form: 70,000 + 9,000 + 30 + 1
Answer:
2 km/h
Step-by-step explanation:
Let x represent the speed of the river current, t₁ be the time spent rowing against the current and t₂ be the time spent rowing with the current.
Since the speed of the still water = 20 km/h.
The speed of rowing against the current = (20 - x)
The speed of rowing with the current = (20 + x)
We know that velocity = distance / time. Hence time = distance / velocity
t₁ = 36 / (20 - x)
t₂ = 22 / (20 + x)
but t₁ + t₂ = 3 hours
Therefore:
3 = 36 / (20 - x) + 22 / (20 + x)
multiply through by 400 - x²
3(400 - x²) = 36(20 + x) + 22(20 - x)
1200 - 3x² = 720 + 36x + 440 - 22x
3x² + 14x -40 = 0
This gives x = -6.7 or x = 2
x cannot be negative therefore x = 2 km/h
The speed of the river current is 2 km/h
Answer:
100- 68.50 = 31. 50 rupees
Step-by-step explanation:
that is 31 rupees and 50 paise
