Advertisements
Advertisements
प्रश्न
A labourer earns Rs 1980 in 12 days.
(i) How much does he earn in 7 days?
(ii) In how many days will he earn Rs 2640?
उत्तर
(i) Earning of a labourer in 12 days = Rs 1980
Earning of the labourer in 1 day = `1980/12` = Rs 165
Earning of the labourer in 7 days = 7 × 165 = Rs 1155
(ii) Number of days taken by the labourer to earn Rs 1980 = 12 days
Number of days taken by him to earn Re 1 = `12/1980` days
Number of days taken by him to earn Rs 2640 = 2640 × `12/1980=31680/1980` = 16 days
APPEARS IN
संबंधित प्रश्न
If a, b, c and d are in proportion prove that `(13a + 17b)/(13c + 17d) = sqrt((2ma^2 - 3nb^2)/(2mc^2 - 3nd^2)`
What number must be added to each of the number 16, 26 and 40 so that the resulting numbers may be in continued proportion?
Find the fourth proportion to the following:
(p2q - qr2 ), (pqr - pr2 ) and (pq2 - pr2)
If a, b, c are in continued proportion, prove that a : c = (a2 + b2) : (b2 + c2).
If a, b, c, d are in continued proportion, prove that:
(a2 + b2 + c2) (b2 + c2 + d2) = (ab + bc + cd)2.
Find the fourth proportional to 3, 12, 15
Find the mean proportion of: 8.1 and 2.5
If a, b, c are in proportion, then
If y is mean proportional between x and z, prove that xyz (x + y + z)³ = (xy + yz + zx)³.
If x, y, z are in continued proportion, prove that: `(x + y)^2/(y + z)^2 = x/z`.
