testwithresult

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1. If an object travels at five feet per second, how many feet does it travel in one hour?

2. What is the average (arithmetic mean) of all the multiples of ten from 10 to 190 inclusive?

3. A cubical block of metal weighs 6 pounds. How much will another cube of the same metal weigh if its sides are twice as long?

4. 25 per cent of 600 is equal to 15 per cent of what number?

5. Given that the sum of the odd integers from 1 to 99 inclusive is 2500, what is the sum of the even integers from 2 to 100 inclusive?

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
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