Explanation for Question 1 If an object travels at five feet per second, how many feet does it travel in one hour? If an object travels at 5 feet per second it covers 5x60 feet in one minute, and 5x60x60 feet in one hour. Answer = 18000
Explanation for Question 2 if the given series is in arithmetic progression then average=(first-term + last-term)/2 The series is: 10,20,30.....190
The average is (10+ 190)/2 answer=100
Explanation for Question 3 Let x be the side of the cube then volume=x3 if side double i.e 2x the volume = (2x)3 given the volume x3 weighs 6 pounds then 8x3weighs (8)(6)pounds answer=48
Explanation for Question 4 the information given in the question is
(25%(600) = 15% n
25 x (600/15) = n
n = 1000
Explanation for Question 5 sum of the terms of arithmetic progression is
(first term + last term)n/2,where 'n' is number of terms. From the question n=50 (all even numbers from 2 to 100) first term=2
last term=100 substitute in the above formula: (2 + 100)50/2 ans= 2550