# Q&Answers: Math/Chemistry/Physics Problems + Solutions

Solution X is 20% chemical A and 80% chemical B by volume; Solution Y is 30% chemical A and 70% chemical B.

Pipe A and pipe B fill water into a tank of capacity 2000 litres, at a rate of 200 l/min and 50 l/min.

2 pipes P1 and P2 together can fill a tank in 6 hrs and P3 alone can fill the tank in 10 hrs if they work together what is the time taken to fill the tank?

Three candidates contested an election and received 561, 716 and 1111votes respectively.

The total of the ages of Jayant, Prem and Saransh is 75 years.

Two trains are moving at 50 kmph and 70 kmph in opposite directions.

Laura has a deck of standard playing cards with 14 of the 70 cards designated as aheart.If Laura shuffles the deck thoroughly and then deals 10 cards off the top of the deck, what is the probability that the 10th card dealt is a heart?

The length of the bridge, which a train 130 meters long and travelling at 45 km/hr can cross in 30 seconds, is

In a box, there are 8 red, 7 blue and 6 green balls.

If |z|/w = 2, which of the following must be true?

The ratio of the ages of Mona and Sona is 4:5.

Following an increase in prices, the price of a candy box was 10 pounds and the price of a can of soda was 6 pounds.

Find the odd man out

On a counter of a donuts store, there are only 16 identical donuts, 11 filled with chocolate and 5 filled with jelly, but the seller tells me that the donuts are randomly placed on the counter.

Bob bikes to school every day at a steady rate of d miles per hour.

A can complete a certain job in 16 days.

The average age of 8 men increases by 2 years when two women are included in place of two men of ages 20 and 10 years.

The present worth of a certain bill due sometime hence is Rs. 400 and the true discount is Rs.

In an exam Ashley secured 332 marks.

All the milk in container A which was filled to its brim was poured into two containers B and C.