Question

A, B, C and D start painting a wall
. A, B and C work at a speed which is
4/5th that of D. If all of them start working together, then the ratio of
time taken by all four to complete the entire work to that taken by D
alone is​

Answer 1

Answer:

17:5

Explanation:

A=4/5D

B=4/5D

C=4/5D

=(A+B+C+D)/D

=(17/5)D/D

=17/5

Answer 2

Answer:

17:5 is the ratio

Explanation:

A, B, C and D start painting a walL.

A, B and C work at a speed which is 4/5th that of D.

If all of them start working together, then the ratio of

time taken by all four to complete the entire work to that taken by D

alone is ​$\frac{ 17}{5}$

$A=\frac{4}{5} D$

$B=\frac{4}{5} D$

$C=\frac{4}{5} D$

$=\frac{(A+B+C+D)}{D}$

$=\frac{\frac{17}{5} D}{D}$

$=\frac{17}{5}$

Time taken by all four to complete the entire work to that taken by D

alone is​ 17 :5

The project code is #SPJ3