1.

Multiply 1 h 15 min 20 s by 4min20480The product 4 h 60 min+ 8015sep460-4 h+ 1h +(60s + 20 5)5 h +(1 min 20 s5h 1 min 20s

Answer»

(1 h 15 m 20 s)*4=4 h 60 m 80 s=5 h 1 m 20 s(because 60s=1m and 60m =1h)



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