Answer:
Step-by-step explanation:
<u>Given:</u>
- Speed of the wind = 3 mph
- Speed in calm weather = x
- Speed with the wind = x + 3
- Speed against the wind = x - 3
<u>We know that:</u>
- distance = time*speed or
- time = distance / speed
<u>We have equal time in both cases so comparing d/s ratios:</u>
<u>Solve for x:</u>
- 56(x - 3) = 30(x + 3)
- 56x - 168 = 30x + 90
- 56x - 30x = 90 + 168
- 26x = 258
- x = 258/26
- x ≈ 9.92
<u>The speed with the wind is:</u>
Answer:
10³
Step-by-step explanation:
10 x 100 = 10¹ x 10² = 10³
Answer:
12
Step-by-step explanation:
3x + x + 42 = 90 ........ 4x = 48 ......x = 12
I=prt
I=950*0.025*6/12=11.875
He will have 950+11.875=961.875