Question

please give solution

Answer 1

1)Hour's hand covers in one day=2×(22/7)×8.4×2=2×22×2×1.2=88×1.2=105.6 cm
2)Minute's hand covers in one day=2×(22/7)×14×24=2×22×2×24=88×24
=2112cm.
Q.10
Circumference of motor's wheel is πd=(22/7)×14=44 cm
In one revolution motor's wheel covers 44cm
then in 27 revolution it covers=27×44=1188cm
therefore same distance covered by Machine's wheel
i.e. 1188=a×(22/7)×94.5
a=(1188×7)/94.5=88 times in one second.
In one hour=60×60×88=316800 times in ine hour.