Question
Which of the following gas usually causes explosions in
coal-mines?Solution
Methane explosions occur in coal-mines when a buildup of methane gas, a by-product of coal, comes into contact with a heat source, and there is not enough air to dilute the gas to levels below its explosion point.
The ratio of heartbreak to emotions is 2:3:4:5 The price of heart is inversely proportional to the square of emotions. If there is a loss of Rs 1420 due...
Three numbers are in ratio 5:6:7. If the sum of the squares of those three numbers is 440 then find the sum of the three numbers.
What is the mean proportion between 4 and 9?
The cost of diamond varies directly as the square of its weight. A diamond broke into four pieces with weights in the ratio 1 : 3 : 4 : 7. if the loss i...
A total amount of Rs. 1220 is to be divided between two friends, Ram and Ranjan, in the ratio (7/9):(11/12). What is the difference between the amounts ...
Rs 1215 is divided among 6 men, 5 women and 3 boys so that the share of a man, a woman and a boy may be in the ratio of 5:6:7. What is the share ...
If A:B = 7:6 and B:C = 12:15 respectively, then find the value of (A + C) :(A + B) .
Ratio of monthly income to monthly expenditure of A is 18:7, respectively and monthly savings of A is Rs. 2200. Find the monthly income of A.
Rs.14000 was divided among A, B and C in the ratio 2:2:3. B kept Rs.1200 for himself, gave Rs.600 to his mother and divided the remaining money among hi...
If the third proportion of 30 and 45 is “0.5k”, then find the value of (k − 18) : (k + 22).
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