find the smallest no. which when increased by 20 is exactly divisible by 90 and 144
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First find the LCM of 90 and 144.
The LCM is 720.
Now subtract 20 and we get 720-20 = 700.
So 700 is the least number which when increased by 20 is exactly divisible both by 90 and 144.
JUSTIFICATION
700 when increased by 20 = 720.
720 is divisible by 90.
720/90 = 8.
720 is also divisible by 144.
720/144 = 5
So the answer is 700.
DAMS
These are large structures constructed across a river or stream to redirect water or store water for irrigation and preventing floods.
MULTIPURPOSE PROJECTS
These are similar to dams but they are constructed not just for irrigation but also for electricity generation , inland navigation , fish breeding and recreation.
Hope it helps.......
If you have any doubts , comment down or message me.
Mark my answer as brainliest if it helped.
- Mâhêshwáràñ.
The LCM is 720.
Now subtract 20 and we get 720-20 = 700.
So 700 is the least number which when increased by 20 is exactly divisible both by 90 and 144.
JUSTIFICATION
700 when increased by 20 = 720.
720 is divisible by 90.
720/90 = 8.
720 is also divisible by 144.
720/144 = 5
So the answer is 700.
DAMS
These are large structures constructed across a river or stream to redirect water or store water for irrigation and preventing floods.
MULTIPURPOSE PROJECTS
These are similar to dams but they are constructed not just for irrigation but also for electricity generation , inland navigation , fish breeding and recreation.
Hope it helps.......
If you have any doubts , comment down or message me.
Mark my answer as brainliest if it helped.
- Mâhêshwáràñ.
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