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
Find the third proportional to a – b and a2 – b2
Find the value of the unknown in the following proportion :
5 : 12 :: 15 : x
If p, q and r in continued proportion, then prove the following :
`"p"^2 - "q"^2 + "r"^2 = "q"^4 (1/"p"^2 - 1/"q"^2 - 1/"r"^2)`
If `a/b = c/d = e/f`, prove that `(ab + cd + ef)^2 = (a^2 + c^2 + e^2) (b^2 + d^2 + f^2)`.
Find the third proportional to 5, 10
If `a/c = c/d = c/f` prove that : (b2 + d2 + f2) (a2 + c2 + e2) = (ab + cd + ef)2
If a, b, c, d are in continued proportion, prove that: (a + d)(b + c) – (a + c)(b + d) = (b – c)2
If a, b, c, d, e are in continued proportion, prove that: a : e = a4 : b4.
10 g of caustic soda dissolved in 100 mL of water makes a solution of caustic soda. Amount of caustic soda needed for 1 litre of water to make the same type of solution is ______.
Determine if the following are in proportion.
24, 28, 36, 48
