Number Magic a textbook of Mathematics 8>Chapter 22 - Time and Work>HOTS>Q 1

MEDIUM

8th CBSE

IMPORTANT

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$A$ can do a piece of work in $20$ days and $B$ in $30$ days. They began to work together but $A$ left after some days. $B$ finished the remaining work in $10$ days. After how many days did $A$ leave?

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Important Questions on Time and Work

MEDIUM

8th CBSE

IMPORTANT

Number Magic a textbook of Mathematics 8>Chapter 22 - Time and Work>HOTS>Q 2

$A$ pipe can fill a tank in $10$ hours. Due to a leak at its bottom, the tank takes $2$ hours extra to fill. If the tank is full, in how much time will it be emptied by the leak $?$

MEDIUM

8th CBSE

IMPORTANT

Number Magic a textbook of Mathematics 8>Chapter 22 - Time and Work>HOTS>Q 3

Pipe

A

can fill an overhead tank in

10

hours and pipe

B

can fill it in

15

hours. Both the pipes are opened and after

4

hours pipe

B

is closed. How much time will

A

take to fill the remaining part of the tank

?