Question
A train passes an electrical pole in 18 seconds and
passes a platform 420 m long in 60 seconds. Find the length of the train.Solution
Let the length of the train be ‘x’ meter. ∴ x/18 = (x + 420)/60 ⇒ 60x = 18x + 7560 ⇒ 42x = 7560 ⇒ x = 180 m
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The mode and the mean of grouped data are 25 and 29.5 respectively. Find the median, correct to two places of decimal, using empirical relation.
Calculate the mean of these values:
25, 30, 28, 27, 29, 26, 32, 31
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If the number 9458k2 is divisible by 8, then find the number of possible values of 'k'.
The interest earned when a sum is invested at simple interest of 25% p.a., for 3 years, is Rs. 1875. What will be the total amount received after 2 year...
If p:q = 5:7 and p + q = 408, then find the value of (q - p).
What is the median of the following list of numbers: 5, 3, 6, 9, 11, 19,12,20, and 1?
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