Question

Palesa takes 3/7 hours to mix cake ,2 2/7 hours to bake it . How many hours altogether does palesa take to complete cake

Answer 1

`\huge\boxed{\sf 2(5)/(7) \ hours}`

Explanation:

Time taken to mix the cake =
`\displaystyle (3)/(7) \ hours`

Time taken to bake it =
`\displaystyle 2 (2)/(7) \ hours`

Time taken altogether:

`\displaystyle = (3)/(7) + 2(2)/(7) \\\\= (3)/(7) + (7 * 2+2)/(7) \\\\= (3)/(7) + (16)/(7) \\\\= (3+16)/(7) \\\\=(19)/(7) \\\\= 2(5)/(7) \ hours\\\\\rule[225]{225}{2}`