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Iron = 6x kg Copper = 4x kg When 20 kg of copper is added then, 2x = 20 x = 10 initial weight of the mixture = 10x = 100 kg
How many times are the hour and the minute hands of a clock at a right angle in a period of two days?
A clock gets fast by 15 minutes every day. If, on a certain day, the clock shows correct time at 12 in the noon, what time will the clock show at 4:00 ...
Find the cube of 373.
At 2'0 clock, the hands of a clock make an acute angle and a reflex angle. How much is the reflex angle (in degrees)?