Afreight train completes its journey of 150 miles 1 hour earlier if its original speed is increased by 5 miles/hour. give the original speed of the train. a. 20 miles/hour b. 25 miles/hour c. 30 miles/hour d. 35 miles/hour

The answer is B

If we assign speed  variable x; and time variable y; then;

xy=150

(y-1) (x+5) = 150

xy + 5y  - x – 5 = 150

(remember xy = 150), therefore;

5y – x = 5

X = 25

Y = 6

answer: the correct answer is   air pressure at the top of mount everest is higher than at the bottom of the grand canyon.

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explanation:

dec 23, 2016 - a load of bricks weighing 680 n a distance of 10 m across a parking lot. if if the worker pushes the cart with a constant force of 209 n, what work= force x distance = 220 n x 10 m = 2200 n.m = 2200 j i don't know where the person got it from, but the initial part, work= force x distance me.