A train travelling at the speed of 66 kmph crosses a 300 m long platform in 24 seconds. How long was the train?
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A dishonest milkman buys milk at Rs 30 per litre and adds 1/5 of water to it and sells the mixture at Rs 32 per litre. What will be his gain?
What is the ratio of simple interest earned on certain amount at the rate of 12% p.a. for 9 years and that for 12 years?
If 2x-y2+(3y-2z)2=0, then the ratio of x:y:z is
Find the total surface area (in cm2) of a cube of side 7.5 cm.
If a boat goes a certain distance at 30 km/h and comes back the same distance at 20 km/hr, what is the average speed (in km/hr) for the total journey?
16/3 =
16/3 = 5.333.. = 5.3
A person crosses a 900 metres wide road in 120 seconds. What is his speed (in km/hr)?
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