1.

The area of four walls of room is given by A=2h(l+b). Make l as the subject of the formula. Find l when `A=100m^(2)`, h=5m, and b=4m.A. `l=(A)/(2h)=b,6m`B. `l=(A)/(2h)-h,5m`C. `l=(A)/(2b)-h,4m`D. `l=(A)/(2b)-h,8m`

Answer» Correct Answer - A
`A=2h(l+b)`
`rArr (A)/(2h)=l+brArr(A)/(2h)-b=l`
`rArr l=(A)/(2h)-b`
Given `A=100m^(2), h=5m`, and `b=4m`.
`rArr l=(100)/(2xx5)-4`
`rArr I=6m`


Discussion

No Comment Found

Related InterviewSolutions