Question

Just need someone to check my answer!

Terrell and Mindi are organizing a neighborhood skateboarding competition. They need to build two mini ramps. Terrell can build the ramps in 15 hours. Mindi can build the ramps in 20 hours. Which shows the equation and solution for the time it will it take Terrell and Mindi to build the ramps if they work together? Round your answer to the nearest hour, if necessary.

Answer 1

i got 9 hours, is that correct?

Answer 2

correct !

Answer 3

T : 1/15 th of work in 1 hour
M : 1/20 th of wotk on 1 hour

T + M
1/15 + 1/20 th of work in 1 hour

7/60 th of work in 1 hour

100% of work in 60/7 hours = 8.57 = ~ 9 hours

Answer 4

okay thank you !

Answer 5

good work ! yw :D