World Geography
Slate is an example of:

Igneous rock
Metamorphic rock
Sedimentary rock
Intrusive igneous rock

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

World Geography
The main objective of multi-purpose river projects are

flood controls and making rivers navigable
All of these
extension of irrigation facilities by constructing dams to store surplus water during the rainy seas
power generation by constructing hydro power stations

ANSWER DOWNLOAD EXAMIANS APP