The water level of a river in may was 30 cm below the normal mask. After the rains the level of the water went up by 25 cm. If the water level written in may is - 30, what will the level after the rains be

-5

Step-by-step explanation:

The water level of the river in May was 30cm below the mark and it was recorded as - 30.

After the rains, the water level went up by 25 cm. The water level will be recorded as:

-30 + 25 = - 5