Answer: Average speed of boat = 32mph
Step-by-step explanation: Full question: 5 hours 20mins. Find the average speed of the boat
Let average speed of boat be mph
Let time to travel downstream = 80/(x + 8 )
Let time to travel upstream = 80/( x - 8)
Total time = 51/3 hrs=16/3 hrs
80/(x +8) +80/(x-8) = 16/3
Multiply both sides with3(×+8)(x-8)
(X+8)(x-8) = (x+8)(x-8)/16
15(2x)=x^2-64
X^2 -30x - 64 =0
Factorizing,you get
(x - 32)(x + 2) => ×=32 or x= -2
x = 32mph
Answer:
120
Step-by-step explanation:
Principal = 24,000
Rate = 1%
Time = 6 months = 0.5
Simple Interest = 24000×1×0.5 ÷ 100
= 120
hey there
The given ratio is 10:16
Let two number be 10x and 16x
Also given sum is 572
=> 10x+16x=572
=> 26x=572
=> x = 572/26 = 22
Now the first number is 10x = 10(22) = 220 and
Another number is 16x = 16(22) = 352
Hope this helps you dear ;)
Answer:
2m
Step-by-step explanation:
To find length you need to find the square root of 4 m².
√4 m² = 2m
Answer:
16
Step-by-step explanation: