 
 <prompt> Akalla ya kama ruwa mai tsawon shekara uku. Akwai wani tsohuwar da ya kawo ruwa don hana matsalolin ruwa a cikin garin. Ya kammala a cikin rana na uku. Yana iya daukar ruwa mai tsawon shekara shida da ruwa mai tsawon uku a rana zuwa kogin kogiya a kogin kogiya don hana matsalolin ruwa a kogin kogiya. A rana na farko ya kama 10 inches. A rana na biyu ya kama miliyan yanzu. A rana na uku, ya kama 50% mafi yawa daga rana na biyu. Ya kama a cikin rana na hudu kafin ya kama matsalolin a rana na hudu. Me ya sa ya kama a cikin rana na hudu? <response>: ```Rana biyu ta ruwa ta yi 10*2=20 inches
A rana uku ta yi 20*1.5=30 inches
Sannan a rana uku, ta yi 10+20+30=60 inches
Ta yi 4-1=3 rana
Sannan ta yi 3*3=9 inches
Don haka a farko na rana uku, akwai 60-9=51 inches a cikin tsaunin
Gaba ta taimaka 6*12=72 inches
Don haka ta yi amma 72-51=21 inches

Sami amsa shine 21.``` 