Advertisements
Advertisements
Question
If the weight of 40 books is 8 kg, then the weight of 15 books is 3 kg
Options
True
False
Advertisements
Solution
True
Explanation;
Hint: Weight of 1 book = `8/40 = 1/5` kg
Weight of 15 books = `1/5 xx 15` = 3 kg
APPEARS IN
RELATED QUESTIONS
If y is the mean proportional between x and z; show that xy + yz is the mean proportional between x2 + y2 and y2 + z2.
If `x = (sqrt(a + 3b) + sqrt(a - 3b))/(sqrt(a + 3b) - sqrt(a - 3b))`, prove that: 3bx2 – 2ax + 3b = 0.
Find the third proportion to the following :
16x2 and 24x
Find the fourth proportional to:
x3 - y2, x4 + x2y2 + y4, x - y.
Find the third proportional to 5, 10
If x + 5 is the mean proportion between x + 2 and x + 9, find the value of x.
If a, b, c and d are in proportion, prove that: `abcd [(1/a^2 + 1/b^2 + 1/c^2 + 1/d^2]` = a2 + b2 + c2 + d2
3 : 5 : : `square` : 20
What number must be added to each of the numbers 4, 6, 8, 11 in order to get the four numbers in proportion?
In the proportional statement p : q :: r : s, which pair of terms represents the means, and which pair represents the extremes?
