Question

in a row, there would be a
be 3 rows more. Find the
24 The students of a class are made to stand
ents of a class are made to stand in (complete) rows. If one student is extra
were would be 2 rows less, and if one student is less in a row, there would
s more. Find the number of students in the class.
Jeweller has bars of 18-carat gold and 12-carat gold. How much of each must be
ned together to obtain a bar of 16-carat gold weighing 120 grams? (Pure gold is
24-carat).
times
20 A and B together can do a piece of work in 15 days. If A's one day work is 1 =
the one day's work of B, find in how many days can each do the work.
Hint. Let A's one day work be x and B's one day work be y. Then
x = y, x+y = 15
27 2 men and 5 women can do a piece of work in 4 days, while one man and one womar
can finish it in 12 days. How long would it take for 1 man to do the work?
8. A train covered a certain distance at a uniform speed. If the train had bee
30 km/h faster, it would have taken 2 hours less than the scheduled time. If the trai
were slower by 15 km/h, it would have taken 2 hours more than the scheduled tim
Find the length of the journey.
Hint. Let the due speed of the train be x km/h and scheduled time by y hours, th​

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