Advertisements
Advertisements
प्रश्न
If 2, 6, p, 54 and q are in continued proportion, find the values of p and q.
उत्तर
2, 6, p, 54 and q are in continued proportional then
⇒ `(2)/(6) = (6)/p = p/(54) = (54)/q`
(i) ∵ `(2)/(6) = (6)/p` then 2p = 36
⇒ p = 18
(ii) `p/(54) = (54)/q`
⇒ pq = 54 x 54
⇒ 18q = 54 x 54
⇒ q = `(54 xx 54)/(18)`
= 162
Hence p = 18, q = 162.
APPEARS IN
संबंधित प्रश्न
Find the fourth proportional to 2xy, x2 and y2.
Find the smallest number that must be subtracted from each of the numbers 20, 29, 84 and 129 so that they are in proportion.
Find the third proportional to:
x - y, x2 - y2
If a, b, c, d are in continued proportion, prove that:
`sqrt(ab) - sqrt(bc) + sqrt(cd) = sqrt((a - b + c) (b - c + d)`
If the cost of a dozen soaps is Rs 285.60, what will be the cost of 15 such soaps?
A car travels 195 km in 3 hours.
(i) How long will it take to travel 520 km?
(ii) How far will it travel in 7 hours at the same speed?
If `a/c = c/d = c/f` prove that : `bd f[(a + b)/b + (c + d)/d + (c + f)/f]^3` = 27(a + b)(c + d)(e + f)
Write True (T) or False (F) against the following statement:
0.9 : 0.36 : : 10 : 4
A student said that the ratios `3/4` and `9/16` were proportional. What error did the student make?
The mean proportion between `3 + 2sqrt(2)` and `3 - 2sqrt(2)` is ______.