Two candles of equal length are lit at the same time. Candle A takes 10 hours to burn out completely while candle B takes 7 hours to burn out completely. Assuming that each candle burns at a constant rate, find the time taken for the candles to burn till the length of candle A is 4 times longer than candle B. Give your answer to the nearest minute.

Q: A thermometer reading 10°C is brought into a room with a constant temperature of 32°C. If the…

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Q: A small motor on a fishing boat can move the boat at a rate of 10 mph in calm water. Traveling with…

A: This is the question that is based on the concept of speed, distance and time. When the boat will…

Q: The half-life of a drug in the bloodstream is 18 hours. if a 1000 mg dose is prescribed, what amount…

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Q: Two rockets are launched towards the moon 1 hour apart. The first rocket launched is traveling at…

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Q: A ship leaves a port going directly west at 45 mph. At the same time the first ship leaves port, a…

A: Formulae used: ddxx=12xddxxn=nxn-1

Q: When I cake is removed from an oven its temperature is 300° F. Three minutes later its temperature…

A: A cake is removed from an oven, its temperature is .Three minutes later its temperature is .The aim…

Q: If a moose can run 35miles per hour for 100 meters, how long can it maintain top speed?

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Q: An airplane can fly due north at 600km/h. After a certain amount of time, it reaches a distance of…

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Q: Which of the following is equal to Cov (2X + Y, X – Y), where X and Y are random variables on a…

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Q: A snail moves at the speed of 2.39 inches per minute.if the snail keeps moving at this rate,how many…

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Q: Two boats travel at right angles to each other after leaving a dock at the  same time. One hour…

A: Given: Two boats travel at right angles. one hour later they are 25miles apart. if one boat travels…

Q: It took a salmon 45 seconds to swim upstream to a certain spot. The salmon then turned around to…

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Q: A body cools from 60°C to 50°C in 15 mins in air which is maintained at 30°C. How long will it take…

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.