Question

A multistorey building has$105$ storeys, every floor of it is$4m$ high. If a balloon rises$3m$ every second, how long will it take to rise from$36th$ floor to$96th$ floor?

Answer 1

Find the time required for the balloon to rise from$36th$ floor to$96th$ floor.

Step1: Find the number of floors between$36th$ floor to$96th$ floor.

Number of floors$=96-36=60$

$\therefore$Number of floors$=60$

Step2: Find the height of$60$ the floors.

The height of$60$ the floors$=60\times$ hight of every floor

$$\begin{gathered} =60\times 4 \\ =240m \end{gathered}$$

$\therefore$The height of$60$ the floors$=240m$

Step3:Find the time required for the balloon to rise from$36th$ floor to$96th$ floor.

The time required for a balloon$=$$240÷3$

$=80seconds$

$\therefore$The time required for the balloon to rise from$36th$ floor to$96th$ floor$=80seconds$